?:authorAffiliation
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[\'Division of Gastroenterology, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, Pennsylvania; Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania. Electronic address: nabeel.khan@va.gov.\', \'Division of Gastroenterology, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, Pennsylvania; Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania; Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania, Philadelphia, Pennsylvania; Leonard Davis Institute of Health Economics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania.\']
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