1Vakil N, van Zanten SV, Kahrilas P, et al. The Montreal definition and classification of gastroesophageal reflux disease: a global evidencebased consensus. Am J Gastroenterol, 2006,101:1900-1920.
2Fass R, Ofman JJ. Gastroesophageal reflux disease-should we adopt a new con ceptual frame work? Am J Gastroenterol, 2002,97: 1901-1909.