Clinical trials registries are underused in the pregnancy and childbirth literature: a systematic review of the top 20 journals
Crossref DOI link: https://doi.org/10.1186/s13104-016-2280-3
Published Online: 2016-10-21
Published Print: 2016-12
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Yerokhin, Vadim V.
Carr, Branden K.
Sneed, Guy
Vassar, Matt