Division of Biostatistics and Epidemiology;
Medical University of South Carolina;
Center for Health Research;
Geisinger Health System;
Digestive Diseases Center;
Medical University of South Carolina;
Department of Pharmacy;
Medical University of South Carolina;
Department of Psychiatry;
Medical University of South Carolina;
Sphincter of Oddi; Abdominal pain; Disability measurement; Reproducibility of results; Pain measurement; Episodic pain;