The Birmingham oral contraceptive trial.
ECKSTEIN
P
P
WATERHOUSE
J A
JA
BOND
G M
GM
MILLS
W G
WG
SANDILANDS
D M
DM
SHOTTON
D M
DM
D003267:Contraception; D003270:Contraceptive Agents; D003276:Contraceptives, Oral; D005260:Female; D006801:Humans
D003270:Contraceptive Agents; D003276:Contraceptives, Oral
CONTRACEPTIVES, ORAL