title: [Pros and cons of the controlled clinical trials registry].
authors.forename: Sergio
authors.initials: S
authors.lastname: Ponce de León
mesh_terms: D002986:Clinical Trials as Topic / Q000592:standards / Q000706:statistics & numerical data; D006801:Humans; D020407:Internet; D008800:Mexico; D011643:Publishing / Q000592:standards; D012042:Registries; D012952:Societies; D014944:World Health Organization