Origin of adenocarcinoma in Barret's esophagus: P53 and KI67 expression and histopathologic background - Silva, Mauricio Rocha e; Cecconello, Ivan; Iriya, Kiyoshi; Marson, Allan Garms; Takeda, Flávio Roberto; Gama-Rodrigues, Joaquim José (Clinics, 2005)