Reference 1: Dale W. Bratzler, D.O., M.P.H., E. Patchen Dellinger, M.D., Keith M. Olsen, Pharm.D., FCCP, FCCM,, Trish M. Perl, M.D., M.SC., Paul G. Auwaerter, M.D., Maureen K. Bolon, M.D., M.S., Douglas N. Fish, Pharm.D., FCCM, FCCP, BCPS, Lena M. Napolitano, M.D., FACS, FCCP, FCCM, Robert G. Sawyer, M.D., FACS, FIDSA, FCCM, Douglas Slain, Pharm.D., BCPS, FCCP, FASHP, James P. Steinberg, M.D., Robert A. Weinstein, M.D., Clinical practice guidelines for antimicrobial prophylaxis in surgery, American Journal of Health-System Pharmacy, Volume 70, Issue 3, 1 February 2013, Pages 195–283, https://doi.org/10.2146/ajhp120568