METHODS	Patients with gastric cancer that was potentially curable with a distal gastrectomy were randomly assigned ( 1:1 ) to receive either intraoperative antimicrobial prophylaxis alone ( cefazolin 1 g before the surgical incision and every 3 h as intraoperative supplements ) or extended antimicrobial prophylaxis ( intraoperative administration plus cefazolin 1 g once after closure and twice daily for 2 postoperative days ) .\