20.12.2007
Randomized multicenter trial of antibiotic prophylaxis in elective colorectal surgery: single dose vs 3 doses of a second-generation cephalosporin without metronidazole and oral antibiotics
S. Fujita, N. Saito, T. Yamada, Y. Takii, K. Kondo, M. Ohuc, E. Ikeda, Y. Moriya
Archives of Surgery, 2007; 142: 657–661