Reliability and validity of the Gastrointestinal Symptom Rating Scale (GSRS) and Quality of Life in Reflux and Dyspepsia (QOLRAD) questionnaire in dyspepsia: A six-country study

by Újszászy László, Van Rensburg Christo J, Regula Jaroslaw, Piqué Jose M, Pacini Franco, Madisch Ahmed, Kulich Károly R, Carlsson Jonas, Halling Katarina, Wiklund Ingela K
Published 2008-01-01