Nifedipine and ritodrine in the management of preterm labor: a randomized multicenter trial.
Lewan
R B
RB
Flynn
C A
CA
D015982:Bias; D005260:Female; D006801:Humans; D009543:Nifedipine / Q000627:therapeutic use*; D007752:Obstetric Labor, Premature / Q000188:drug therapy*; D011247:Pregnancy; D012107:Research Design / Q000592:standards*; D012312:Ritodrine / Q000627:therapeutic use*; D015149:Tocolytic Agents / Q000627:therapeutic use*
D015149:Tocolytic Agents; D012312:Ritodrine; D009543:Nifedipine