Gastroesophageal reflux disease: clinical, endoscopic, and intraluminal esophageal pH monitoring evaluation - Nasi, A.; Moraes Filho, Joaquim Prado Pinto de; Zilberstein, Bruno; Cecconello, Ivan; Gama Rodrigues, Joaquim José; Pinotti, Henrique Walter (Diseases of the Esophagus, 2001)