4Owens SM, Brozanski BS, Meyn LA, et al. Antimicrobial prophylaxis for cesarean delivery before skin incision. Obstet Gynecol, 2009,114: 573-579.
5Kaimal AJ, Zlatnik MG, Cheng YW, et al. Effect of a change in policy regarding the timing of prophylactic antibiotics on the rate of posteesarean delivery surgical-site infections. Am J Obstet Gynecol,2008,199:310. e1-e5.
6Costantine MM, Rahman M, Ghulmiyah L, et al. Timing of perioperative antibiotics for cesarean delivery, a metaanalysis. Am J Obstet Gynecol, 2008,199 : 301. e1-e6.