Clinical trial registration: transparency is the watchword.
Sim
Ida
I
Department of Research Policy and Cooperation, World Health Organization, 1211 Geneva 27, Switzerland. simi@who.int
Chan
An-Wen
AW
Gülmezoglu
A Metin
AM
Evans
Tim
T
Pang
Tikki
T
D002986:Clinical Trials as Topic; D006801:Humans; D012042:Registries