1. Castell DO, Donner MW. Evaluation of dysphagia: a careful history is crucial. Dysphagia. 1987;2:65–71.
2. Palmer JB, et al. Evaluation and treatment of swallowing impairments. Am Fam Physician. 2000;61(8):2453–62.
3. Crary MA, Groher ME. Introduction to adult swallowing disorders. Philadelphia: Butterworth Heinemann; 2003.
4. DeVries DR, et al. Gastroesophageal reflux disease, relation with hiatal hernia, body mass index, esophageal acid exposure. Am J Gastroenterol. 2008;103:1349–54.
5. Corley DA, Kubo A, Levin TR, et al. Abdominal obesity and body mass index at risk patients for Barett’s esophagus. Gastroenterology. 2007;133:34–41.