Methodological considerations for evaluating preterm birth.
Chan
Ronna L
RL
D005260:Female; D006801:Humans; D008297:Male; D011247:Pregnancy; D047928:Premature Birth / Q000208:ethnology* / Q000235:genetics*; D044469:Racial Groups / Q000235:genetics*; D012106:Research / Q000592:standards*