3Shaw MJ, Talley N J, P, eebe TJ, et al. Initial validation of a diagnostic questionnaire for gastroesophageal reflux disease. Am J Gastroenterol, 2001, 96:52-57.
4DeVault KR, Castell DO. Updated guidelines for diagnosis and treatment of gastroesophageal reflux disease. Am J Gastroenterol,1999,94: 1434-1442.
5Carlsson R, Dent J, Bolling-Sternevald E,et al. The usefulness of a structured questionnaire in the assessment of symptomatic gastroesophageal reflux disease. Scand J Gastroenterol, 1998, 33: 1023-1029.
6Swets JA. Measuring the accuracy of diagnostic systems. Sciences,1988, 240 : 1285.
