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

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