Multicentre trials in obstetrics and gynaecology. Smaller explanatory trials are required.
Gulmezoglu
A M
AM
Brocklehurst
P
P
Elbourne
D
D
Garcia
J
J
Macfarlane
A
A
D005260:Female; D006801:Humans; D015337:Multicenter Studies as Topic; D011247:Pregnancy; D011248:Pregnancy Complications; D016032:Randomized Controlled Trials as Topic; D016387:Women's Health