1. Comité technique national des infections nosocomiales, ministère de l'Emploi et la Solidarité,1999
2. CDC definitions of nosocomial surgical site infections, 1992: a modification of CDC definition of surgical wound infections;Horan;Infect Control Hosp Epidemiol,1992
3. Surgical wound infection rates by wound class, operative procedure and patient risk index;Culver;Am J Surg,1991
4. The ASA classification of physical status: a recapitulation;Keats;Anesthesiology,1978
5. Definitions and classifications of surgical infections;Altemeier,1984