Previously unidentified duplicate registrations of clinical trials: an exploratory analysis of registry data worldwide
Crossref DOI link:
Update policy: https://doi.org/10.1007/SPRINGER_CROSSMARK_POLICY
van Valkenhoef, Gert
Loane, Russell F.
Zarin, Deborah A.
Funding for this research was provided by:
U.S. National Library of Medicine
Text and Data Mining valid from 2016-07-15
Version of Record valid from 2016-07-15
19 October 2015
8 June 2016
15 July 2016