4Wahlqvist P, Guyatt GH, Armstrong D, Degl'innocenti A, Heels-Ansdell D, El-Dika S, Wiklund I, Fallone CA, Tanser L, Veldhuyzen van Zanten S, Austin P, Barkun AN, Chiba N, Schunemann HJ. The Work Productivity and Activity Impairment Questionnaire for Patients with Gastroesophageal Reflux Disease (WPAI- GERD): responsiveness to change and English language validation. Pharmacoeconomics 2007; 25: 385-396.
5Mokrowiecka A, Jurek K, Pinkowski D, Maiecka- Panas E. The comparison of Health-Related Quality of Life (HRQL) in patients with GERD, peptic ulcer disease and ulcerative colitis. Adv Med Sci 2006; 51: 142-147.
6Lee YC, Wang HP, Chiu HM, Liao SC, Huang SP,Lai YP, Wu MS, Chen MF, Lin JT. Comparative analysis between psychological and endoscopic profiles in patients with gastroesophageal reflux disease: a prospective study based on screening endoscopy. J Gastroenterol Hepatol 2006; 21:798-804.
7Locke GR 3rd, Weaver AL, Melton LJ 3rd, Talley NJ. Psychosocial factors are linked to functional gastrointestinal disorders: a population based nested case-control study. Am J Gastroenterol 2004; 99: 350-357.
8Wright CE, Ebrecht M, Mitchell R, Anggiansah A, Weinman J. The effect of psychological stress on symptom severity and perception in patients with gastro-oesophageal reflux. J Psychosom Res 2005; 59: 415-424.
9Kalinowska E, Tarnowski W, Bielecki K, Banasiewicz J. Quality of life before and after laparoscopic fundoplication. Does quality of life depend on psychological factors? Preliminary report. Wiad Lek 2006; 59:772-777.
