1. Responsiveness and interpretation of a symptom severity index specific to upper gastrointestinal disorders 
Dennis A. Revicki, Anne M. Rentz, Jan Tack, Vincenzo Stanghellini, Nicholas J. Talley, Peter Kahrilas, Christine de la Loge, Elyse Trudeau, Dominique Dubois 
Clinical Gastroenterology and Hepatology 
Volume 2, Issue 9, Pages (September 2004)
DOI: /S (04)
Copyright © 2004 American Gastroenterological Association Terms and Conditions

2. Figure 1
Mean PAGI-SYM scores by global disease severity in the GERD sample. ANCOVA model, baseline data, adjusted for age and gender.
Clinical Gastroenterology and Hepatology 2004 2, DOI: ( /S (04) )
Copyright © 2004 American Gastroenterological Association Terms and Conditions

3. Clinical Gastroenterology and Hepatology 2004 2, 769-777DOI: (10
Clinical Gastroenterology and Hepatology 2004 2, DOI: ( /S (04) )
Copyright © 2004 American Gastroenterological Association Terms and Conditions