Registering clinical trials: an essential role for WHO.
Evans
Timothy
T
Evidence and Information for Policy, World Health Organization, Geneva, CH-1211, Switzerland.
Gülmezoglu
Metin
M
Pang
Tikki
T
D018849:Controlled Clinical Trials as Topic; D033181:Information Dissemination; D011643:Publishing; D012042:Registries; D014944:World Health Organization