Availability of results of clinical trials registered on EU Clinical Trials Register: cross sectional audit study
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Objective: To identify the availability of results for trials registered on the European Union Clinical Trials Register (EUCTR) compared with other dissemination routes to understand its value as a results repository. Design: Cross sectional audit study. Setting: EUCTR protocols and results sections, data extracted 1-3 December 2020. Population: Random sample of 500 trials registered on EUCTR with a completion date of more than two years from the beginning of searches (ie, 1 December 2018). Main outcome measures: Proportion of trials with results across the examined dissemination routes (EUCTR, ClinicalTrials.gov, ISRCTN registry, and journal publications), and for each dissemination route individually. Prespecified secondary outcomes were number and proportion of unique results, and the timing of results, for each dissemination route. Results: In the sample of 500 trials, availability of results on EUCTR (53.2%, 95% confidence interval 48.8% to 57.6%) was similar to the peer reviewed literature (58.6%, 54.3% to 62.9%) and exceeded the proportion of results available on other registries with matched records. Among the 383 trials with any results, 55 (14.4%, 10.9% to 17.9%) were only available on EUCTR. Also, after the launch of the EUCTR results database, median time to results was fastest on EUCTR (1142 days, 95% confidence interval 812 to 1492), comparable with journal publications (1226 days, 1074 to 1551), and exceeding ClinicalTrials.gov (3321 days, 1653 to undefined). For 117 trials (23.4%, 19.7% to 27.1%), however, results were published elsewhere but not submitted to the EUCTR registry, and no results were located in any dissemination route for 117 trials (23.4%, 19.7% to 27.1). Conclusions: EUCTR should be considered in results searches for systematic reviews and can help researchers and the public to access the results of clinical trials, unavailable elsewhere, in a timely way. Reporting requirements, such as the EU's, can help in avoiding research waste by ensuring results are reported. The registry's true value, however, is unrealised because of inadequate compliance with EU guidelines, and problems with data quality that complicate the routine use of the registry. As the EU transitions to a new registry, continuing to emphasise the importance of EUCTR and the provision of timely and complete data is critical. For the future, EUCTR will still hold important information from the past two decades of clinical research in Europe. With increased efforts from sponsors and regulators, the registry can continue to grow as a source of results of clinical trials, many of which might be unavailable from other dissemination routes.
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Beyond journal publication, trial registries and preprint servers are important venues for dissemination.
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Cites
UpSet: Visualization of Intersecting Sets
Lex, A., Gehlenborg, N., Strobelt, H., Vuillemot, R., & Pfister, H. (2014) · IEEE Transactions on Visualization and Computer Graphics · doi:10.1109/tvcg.2014.2346248 · Cited by 2,340 · see citing works
Biomedical research: increasing value, reducing waste.
Macleod, M. R., Michie, S., Roberts, I., Dirnagl, U., Chalmers, I., Ioannidis, J. P. A., Salman, R. A.-S., Chan, A.-W., & Glasziou, P. (2014) · The Lancet · doi:10.1016/s0140-6736(13)62329-6 · Cited by 1,003 · see citing works
Zhou, Q.-H. (2015) · Chinese Nursing Research · doi:10.1016/j.cnre.2016.01.001 · Cited by 738 · see citing works
Hopewell, S., Clarke, M., Moher, D., Wager, E., Middleton, P., Altman, D. G., Schulz, K. F., & and the CONSORT Group (2008) · PLoS Medicine · doi:10.1371/journal.pmed.0050020 · Cited by 674 · see citing works
Dickersin, K. (2003) · JAMA · doi:10.1001/jama.290.4.516 · Cited by 512 · see citing works
(2002) · PubMed · Cited by 410 · see citing works
DeVito, N. J., Bacon, S., & Goldacre, B. (2020) · The Lancet · doi:10.1016/s0140-6736(19)33220-9 · Cited by 336 · see citing works
Self-citationTiming and Completeness of Trial Results Posted at ClinicalTrials.gov and Published in Journals
Riveros, C., Dechartres, A., Perrodeau, E., Haneef, R., Boutron, I., & Ravaud, P. (2013) · PLoS Medicine · doi:10.1371/journal.pmed.1001566 · Cited by 269 · see citing works
Hartung, D. M., Zarin, D. A., Guise, J., McDonagh, M. S., Paynter, R. A., & Helfand, M. (2014) · Annals of Internal Medicine · doi:10.7326/m13-0480 · Cited by 239 · see citing works
Chen, R., Desai, N. R., Ross, J. S., Zhang, W., Chau, K. H., Wayda, B., Murugiah, K., Lu, D. Y., Mittal, A., & Krumholz, H. M. (2016) · BMJ · doi:10.1136/bmj.i637 · Cited by 227 · see citing works
Discontinuation and Nonpublication of Randomized Clinical Trials Conducted in Children
Pica, N., & Bourgeois, F. T. (2016) · PEDIATRICS · doi:10.1542/peds.2016-0223 · Cited by 193 · see citing works
Goldacre, B. M., DeVito, N., Heneghan, C., Irving, F., Bacon, S., Fleminger, J., & Curtis, H. J. (2018) · BMJ · doi:10.1136/bmj.k3218 · Cited by 180 · see citing works
Self-citation10-Year Update on Study Results Submitted to ClinicalTrials.gov
Zarin, D. A., Fain, K. M., Dobbins, H. D., Tse, T., & Williams, R. J. (2019) · New England Journal of Medicine · doi:10.1056/nejmsr1907644 · Cited by 150 · see citing works
Tang, E., Ravaud, P., Riveros, C., Perrodeau, É., & Dechartres, A. (2015) · BMC Medicine · doi:10.1186/s12916-015-0430-4 · Cited by 128 · see citing works
Baudard, M., Yavchitz, A., Ravaud, P., Perrodeau, E., & Boutron, I. (2017) · BMJ · doi:10.1136/bmj.j448 · Cited by 107 · see citing works
Non-publication and delayed publication of randomized trials on vaccines: survey
Manzoli, L., Flacco, M. E., D’Addario, M., Capasso, L., Vito, C. D., Marzuillo, C., Villari, P., & Ioannidis, J. P. A. (2014) · BMJ · doi:10.1136/bmj.g3058 · Cited by 98 · see citing works
Linking ClinicalTrials.gov and PubMed to Track Results of Interventional Human Clinical Trials
Huser, V., & Cimino, J. J. (2013) · PLoS ONE · doi:10.1371/journal.pone.0068409 · Cited by 90 · see citing works
Searching clinical trials registers: guide for systematic reviewers
Hunter, K. E., Webster, A. C., Page, M. J., Willson, M. L., McDonald, S. J., Berber, S., Skeers, P., Tan, A. G., Parkhill, A., & Seidler, A. L. (2022) · BMJ · doi:10.1136/bmj-2021-068791 · Cited by 86 · see citing works
Trial Registration Numbers Are Underreported in Biomedical Publications
van de Wetering, F. T., Scholten, R. J. P. M., Haring, T., Clarke, M., & Hooft, L. (2012) · PLoS ONE · doi:10.1371/journal.pone.0049599 · Cited by 79 · see citing works
Fleminger, J., & Goldacre, B. M. (2018) · PLoS ONE · doi:10.1371/journal.pone.0193088 · Cited by 64 · see citing works
Self-citationHwang, T. J., Tomasi, P. A., & Bourgeois, F. T. (2018) · PLoS Medicine · doi:10.1371/journal.pmed.1002520 · Cited by 64 · see citing works
Jones, C. W., Keil, L. G., Weaver, M. A., & Platts-Mills, T. F. (2014) · Systematic Reviews · doi:10.1186/2046-4053-3-126 · Cited by 61 · see citing works
Study-based registers reduce waste in systematic reviewing: discussion and case report
Shokraneh, F., & Adams, C. E. (2019) · Systematic Reviews · doi:10.1186/s13643-019-1035-3 · Cited by 61 · see citing works
Powell-Smith, A., & Goldacre, B. M. (2016) · F1000Research · doi:10.12688/f1000research.10010.1 · Cited by 59 · see citing works
Self-citationWieschowski, S., Riedel, N., Wollmann, K., Kahrass, H., Müller-Ohlraun, S., Schuermann, C., Kelley, S., Kszuk, U., Siegerink, B., Dirnagl, U., et al. (2019) · Journal of Clinical Epidemiology · doi:10.1016/j.jclinepi.2019.06.002 · Cited by 57 · see citing works
Bashir, R., Bourgeois, F. T., & Dunn, A. G. (2017) · Systematic Reviews · doi:10.1186/s13643-017-0518-3 · Cited by 47 · see citing works
Talebi, R., Redberg, R. F., & Ross, J. S. (2020) · Trials · doi:10.1186/s13063-020-04603-9 · Cited by 41 · see citing works
Riedel, N., Wieschowski, S., Brückner, T., Holst, M., Kahrass, H., Nury, E., Meerpohl, J. J., Salholz‐Hillel, M., & Strech, D. (2021) · Journal of Clinical Epidemiology · doi:10.1016/j.jclinepi.2021.12.012 · Cited by 39 · see citing works
Isojarvi, J., Wood, H., Lefebvre, C., & Glanville, J. (2018) · Research Synthesis Methods · doi:10.1002/jrsm.1294 · Cited by 38 · see citing works
The significance of the trial outcome was associated with publication rate and time to publication
Song, S. Y., Koo, D.-H., Jung, S.-Y., Kang, W., & Kim, E. Y. (2017) · Journal of Clinical Epidemiology · doi:10.1016/j.jclinepi.2017.02.009 · Cited by 36 · see citing works
Reliability of Trial Information Across Registries for Trials With Multiple Registrations
Speich, B., Gloy, V., Klatte, K., Gryaznov, D., Heravi, A. T., Ghosh, N., Marian, I. R., Lee, H., Mansouri, A., Lohner, S., et al. (2021) · JAMA Network Open · doi:10.1001/jamanetworkopen.2021.28898 · Cited by 35 · see citing works
Most systematic reviews of adverse effects did not include unpublished data
Golder, S., Loke, Y. K., Wright, K. E., & Sterrantino, C. (2016) · Journal of Clinical Epidemiology · doi:10.1016/j.jclinepi.2016.05.003 · Cited by 30 · see citing works
Khan, N. A., Singh, M., Spencer, H. J., & Torralba, K. D. (2014) · Arthritis & Rheumatology · doi:10.1002/art.38784 · Cited by 30 · see citing works
Publication status of contemporary oncology randomised controlled trials worldwide
Chen, Y., Liu, X., Lv, J.-W., Li, W., Zhang, Y., Guo, Y. Q., Lin, A.-H., Sun, Y. H., Mao, Y., & Ma, J. (2016) · European Journal of Cancer · doi:10.1016/j.ejca.2016.06.010 · Cited by 24 · see citing works
Utilization of Clinical Trials Registries in Obstetrics and Gynecology Systematic Reviews
Bibens, M. E., Chong, A. B., & Vassar, M. B. (2016) · Obstetrics and Gynecology · doi:10.1097/aog.0000000000001204 · Cited by 21 · see citing works
DeVito, N., & Goldacre, B. M. (2022) · Clinical Trials · doi:10.1177/17407745211073483 · Cited by 21 · see citing works
Self-citationStrengthening the FDA’s Enforcement of ClinicalTrials.gov Reporting Requirements
Ramachandran, R., Morten, C. J., & Ross, J. S. (2021) · JAMA · doi:10.1001/jama.2021.19773 · Cited by 21 · see citing works
Lampert, A., Hoffmann, G. F., & Ries, M. (2016) · PLoS ONE · doi:10.1371/journal.pone.0144973 · Cited by 19 · see citing works
Strzebońska, K., Wasylewski, M. T., Zaborowska, Ł., Riedel, N., Wieschowski, S., Strech, D., & Waligóra, M. (2020) · BMJ Open · doi:10.1136/bmjopen-2019-034666 · Cited by 18 · see citing works
Systematic Reviewers in Clinical Neurology Do Not Routinely Search Clinical Trials Registries
Sinnett, P., Carr, B., Cook, G., Mucklerath, H., Varney, L., Weiher, M., Yerokhin, V., & Vassar, M. B. (2015) · PLoS ONE · doi:10.1371/journal.pone.0134596 · Cited by 16 · see citing works
Clinical trial registry use in anaesthesiology systematic reviews
Umberham, B. A., Detweiler, B., Sims, M. T., & Vassar, M. B. (2017) · European Journal of Anaesthesiology · doi:10.1097/eja.0000000000000671 · Cited by 16 · see citing works
Clinical Trial Registry Use in Orthopaedic Surgery Systematic Reviews
Reddy, A. K., Anderson, J. M., Gray, H. M., Fishbeck, K., & Vassar, M. B. (2021) · Journal of Bone and Joint Surgery · doi:10.2106/jbjs.20.01743 · Cited by 16 · see citing works
Knelangen, M., Hausner, E., Metzendorf, M., Sturtz, S., & Waffenschmidt, S. (2017) · Journal of Clinical Epidemiology · doi:10.1016/j.jclinepi.2017.11.003 · Cited by 15 · see citing works
Munch, T., Dufka, F. L., Greene, K. A., Smith, S. M., Dworkin, R. H., & Rowbotham, M. C. (2014) · Pain · doi:10.1016/j.pain.2014.04.007 · Cited by 14 · see citing works
Rawal, B., & Deane, B. R. (2013) · Current Medical Research and Opinion · doi:10.1185/03007995.2013.860371 · Cited by 14 · see citing works
Trial Registry Use in Surgery Systematic Reviews: A Cross-Sectional Study
Gray, H. M., Simpson, A., Bowers, A., Johnson, A., & Vassar, M. B. (2019) · Journal of Surgical Research · doi:10.1016/j.jss.2019.09.067 · Cited by 13 · see citing works
Steele, L., Lee, H.-C., Maruthappu, T., & O’Toole, E. A. (2021) · Clinical and Experimental Dermatology · doi:10.1111/ced.14615 · Cited by 13 · see citing works
Dal‐Ré, R., Goldacre, B. M., Mahíllo, I., & DeVito, N. (2021) · Journal of Clinical Epidemiology · doi:10.1016/j.jclinepi.2021.11.005 · Cited by 13 · see citing works
Self-citationKeil, L. G., Platts‐Mills, T. F., & Jones, C. W. (2014) · Annals of Emergency Medicine · doi:10.1016/j.annemergmed.2014.10.001 · Cited by 12 · see citing works
Salholz‐Hillel, M., Strech, D., & Carlisle, B. G. (2022) · Clinical Trials · doi:10.1177/17407745221087456 · Cited by 12 · see citing works
Rawal, B., & Deane, B. R. (2015) · Current Medical Research and Opinion · doi:10.1185/03007995.2015.1047749 · Cited by 10 · see citing works
Shepshelovich, D., Yelin, D., Gafter-Gvili, A., Goldman, S., Avni, T., & Yahav, D. (2018) · Clinical Microbiology and Infection · doi:10.1016/j.cmi.2018.02.010 · Cited by 10 · see citing works
Fain, K. M., Rajakannan, T., Tse, T., Williams, R. J., & Zarin, D. A. (2018) · JAMA Internal Medicine · doi:10.1001/jamainternmed.2018.0263 · Cited by 10 · see citing works
Cooper, C., Court, R. A., Kotas, E., & Schauberger, U. (2021) · Research Synthesis Methods · doi:10.1002/jrsm.1477 · Cited by 10 · see citing works
European law could boost clinical trials reporting
Casassus, B. (2021) · Science · doi:10.1126/science.373.6552.268 · Cited by 9 · see citing works
Liu, S., Bourgeois, F. T., & Dunn, A. G. (2021) · Research Synthesis Methods · doi:10.1002/jrsm.1545 · Cited by 9 · see citing works
Davidović, N., Tokalić, R., Burilović, E., Pejdo, S., Marušić, A., Singh, S. P., & Franić, T. (2019) · European Child & Adolescent Psychiatry · doi:10.1007/s00787-019-01392-8 · Cited by 6 · see citing works
An analysis of data sources and study registries used in systematic reviews
Nick, J. M., & Sarpy, N. L. (2022) · Worldviews on Evidence-Based Nursing · doi:10.1111/wvn.12614 · Cited by 6 · see citing works
Deane, B. R., & Sivarajah, J. (2016) · Current Medical Research and Opinion · doi:10.1080/03007995.2016.1263612 · Cited by 4 · see citing works
UK universities lack transparency on clinical trials
Gourd, E. (2019) · The Lancet Oncology · doi:10.1016/s1470-2045(19)30064-6 · Cited by 3 · see citing works
Decullier, É., Tang, P. V., Huot, L., & Maisonneuve, H. (2021) · Scientometrics · doi:10.1007/s11192-020-03775-0 · Cited by 3 · see citing works
EU’s new clinical trial system aims to streamline approvals and improve transparency
Mahase, E. (2022) · BMJ · doi:10.1136/bmj.o228 · Cited by 2 · see citing works
New EU trial reporting regulations must be enforced
DeVito, N., & Goldacre, B. M. (2022) · BMJ · doi:10.1136/bmj.o410 · Cited by 2 · see citing works
Self-citationCross-registration and results availability of trials registered on the EUCTRPreprint
DeVito, N., Richards, G. C., & Smith, J. A. (2020) · doi:10.17605/osf.io/r3vc5 · Cited by 1 · see citing works
Self-citation
Flagged first, then by citations
1 of the 65 references couldn’t be matched to a known paper.
Research works printed but not linked: 5
- [5]European Commission. Commission guideline—guidance on posting and publication of result-related information on clinical trials in relation to the implementation of article 57(2) of regulation (EC) no 726/2004 and article 41(2) of regulation (EC) no 1901/2006. Official J Eur Union 2012; 55: 7– 10.
- [6]European Parliament and the Council of the European Union. Regulation (EC) No 1901/2006 of the European Parliament and of the Council of 12 December 2006 on medicinal products for paediatric use and amending regulation (EEC) No 1768/92, directive 2001/20/EC, directive 2001/83/EC, and regulation (EC) no 726/2004. Official J Eur Union 2006; 49: 1– 19.
- [8]European Parliament and the Council of the European Union. Regulation (EC) No 536/2014 of the European Parliament and of the Council of 16 April 2014 on clinical trials on medicinal products for human use, and repealing directive 2001/20/EC. Official J Eur Union 2014; 57: 1– 76.
- [12]Clinical trials letters published. UK Parliament. 2019. Available: https://old.parliament.uk/business/committees/committees-a-z/commons-select/science-and-technology-committee/news-parliament-2017/clinical-trials-letters-published-2019/ [Accessed 25 Feb 2022].
- [65]Lefebvre C, Glanville J, Briscoe S, et al. Chapter 4: searching for and selecting studies. Cochrane Handbook for Systematic Reviews of Interventions Wiley-Blackwell 2021. Available: https://training.cochrane.org/handbook/current/chapter-04
Cited by
Sorted by citations
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SPIRIT 2025 explanation and elaboration: updated guideline for protocols of randomised trials
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Anderson, L. N., Hoyt, C. T., Zucker, J., McNaughton, A. D., Teuton, J., Karis, K., Arokium-Christian, N. N., Warley, J. T., Stromberg, Z. R., Gyori, B. M., et al. (2025) · Frontiers in Immunology · doi:10.3389/fimmu.2025.1502484 · Cited by 23 · see citing works
Nonregistration, Discontinuation, and Nonpublication of Randomized Trials
Speich, B., Heravi, A. T., Schönenberger, C., Hausheer, L., Gryaznov, D., Busse, J. W., Covino, M., Lohner, S., Chiaborelli, M., Schwenke, J. M., et al. (2025) · JAMA Network Open · doi:10.1001/jamanetworkopen.2025.24440 · Cited by 14 · see citing works
Dal‐Ré, R., García-Méndez, E., & Mahíllo, I. (2025) · European Journal of Clinical Pharmacology · doi:10.1007/s00228-024-03791-6 · Cited by 13 · see citing works
Reproducibility failure in biomedical research: problems and solutions
Haven, T. L., & Ioannidis, J. P. A. (2026) · Annual Review of Medicine · doi:10.1146/annurev-med-050124-050859 · Cited by 9 · see citing works
Kaul, T., Damen, J. A., Seidler, A. L., Willson, M. L., Karam, G., Idema, D. L., Kusters, M. P. T., Dowsett, M. A., Abutahoun, T. I. H., Hooft, L., et al. (2025) · Journal of Clinical Epidemiology · doi:10.1016/j.jclinepi.2025.111901 · Cited by 7 · see citing works
Protocol publication rate and comparison between article, registry and protocol in RCTs
Mathieu, S., Bouillon‐Minois, J., Triché, L. R., Coudeyre, E., de Chazeron, I., Finotto, T., Laporte, C., Moisset, X., Samalin, L., Villatte, G., et al. (2025) · BMC Medical Research Methodology · doi:10.1186/s12874-025-02471-y · Cited by 7 · see citing works
Hemming, K., Kudrna, L., Watson, S., Taljaard, M., Greenfield, S., Goulão, B., & Lilford, R. J. (2024) · BMC Medical Research Methodology · doi:10.1186/s12874-024-02366-4 · Cited by 5 · see citing works
Clinical-trial reporting is on the rise
Vesper, I. (2024) · Nature · doi:10.1038/d41586-024-03317-1 · Cited by 3 · see citing works
Is full transparency in clinical trials an achievable goal?
Dal‐Ré, R. (2024) · European Journal of Internal Medicine · doi:10.1016/j.ejim.2024.03.006 · Cited by 1 · see citing works
Methods for Generating and Documenting Paradata
Liu, Y., & Huvila, I. (2025) · Cambridge University Press eBooks · doi:10.1017/9781009366564.005 · Cited by 1 · see citing works
Research waste in total knee arthroplasty studies: an observational study on registered trials
Iken, A. R., Schaap, M., Poolman, R. W., & Gademan, M. G. J. (2026) · BMJ Open · doi:10.1136/bmjopen-2024-092409 · Cited by 1 · see citing works
Fernandez, L., Atria, E. B., Yerunkar, S. S., Salholz‐Hillel, M., Nachev, V., Schorr, S. G., Strech, D., & Franzen, D. L. (2026) · BMJ Open · doi:10.1136/bmjopen-2025-105173 · Cited by 1 · see citing works
Borah, R., Samanta, A. D., Mendiratta, J., Mishra, M., & Saberwal, G. (2024) · BMC Medical Research Methodology · doi:10.1186/s12874-024-02336-w · Cited by 1 · see citing works
Fernandez, L., Atria, E. B., Yerunkar, S. S., Salholz‐Hillel, M., Nachev, V., Schorr, S. G., Strech, D., & Franzen, D. L. (2025) · medRxiv · doi:10.1101/2025.04.01.25325043
IFNIKB: a type I interferon database for antitumour immunity studies
Ma, F., Li, K., Yu, Y., Zhang, L., Zhang, L., Li, B., & Zhang, L. (2026) · Database · doi:10.1093/database/baag053
- Authors
- DeVito, N. J., Morley, J., Smith, J. A., Drysdale, H., Goldacre, B., & Heneghan, C.
- Affiliations
- University of Oxford (GB)
- Nuffield Orthopaedic Centre (GB)
- Corresponding author
- DeVito, Nicholas J
- Venue
- BMJ Medicine
- Publisher
- BMJ
- Published
- 2024-01
- Volume
- 3
- Issue
- 1
- Pages
- e000738
- ISSN
- 2754-0413 (ISSN-L)
- PMC
- PMC10806997
- OpenAlex
- W4390817849
- Cited by
- 18
- References
- 65
- Citations by year
- 2026: 3 · 2025: 11 · 2024: 4
- FWCI
- 6.72
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- BMJ Medicine (publishedVersion, cc-by-nc)
- PubMed Central (publishedVersion, cc-by-nc)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Good Thinking Society (N/A)
- Naji Foundation (N/A)
- Topics
- Social Sciences › Decision Sciences › Information Systems and Management › Academic Publishing and Open Access
- Physical Sciences › Computer Science › Information Systems › Research Data Management Practices
- Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Meta-analysis and systematic reviews
- Keywords
- ClinicalTrials.gov, journal publishing, time to result, research waste
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