bibliographicCitation |
Wahlqvist 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, Schünemann 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(5):385–96. doi: 10.2165/00019053-200725050-00003. PMID: 17488137. |