TY - GEN AU - Lewan,R B AU - Flynn,C A TI - Nifedipine and ritodrine in the management of preterm labor: a randomized multicenter trial SN - 0029-7844 PY - 1997///1230 KW - Bias KW - Female KW - Humans KW - Nifedipine KW - therapeutic use KW - Obstetric Labor, Premature KW - drug therapy KW - Pregnancy KW - Research Design KW - standards KW - Ritodrine KW - Tocolytic Agents N1 - Publication Type: Letter; Comment UR - https://doi.org/10.1016/s0029-7844(97)00574-7 ER -