Risk factor for post operatory endophtalmitis caused by Pseudomonas aeruginosa in a specialized ophtalmologic center in São Paulo, Brazil - Luz, Reginaldo Adalberto de; Padoveze, Maria Clara; Cvintal, Tadeu; Morais, Leila C.; Falabella, Paulo; Ghirelli, Wagner (Society for Healthcare Epidemiology of America (SHEA) Annual Scientific Meeting, 2011)