Methods and interpretation in systematic reviews: commentary on two parallel reviews of epidural analgesia during labor.
Thacker
Stephen B
SB
Epidemiology Program Office, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
Stroup
Donna F
DF
D015360:Analgesia, Epidural; D016362:Analgesia, Obstetrical; D005260:Female; D006801:Humans; D011247:Pregnancy