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Is reviewing trial protocols on clinicaltrials.gov a feasible method of compiling a long-list for a core outcome set?

Crossref DOI link: https://doi.org/10.1186/1745-6215-16-S3-P6

Published Online: 2015-11-24

Published Print: 2015-12

Update policy: https://doi.org/10.1007/springer_crossmark_policy

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