?:authorAffiliation
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[\'Gastroenterology, Corporal Michael J Crescenz VA Medical Center, Philadelphia, Pennsylvania, USA nabeelk@pennmedicine.upenn.edu.\', \'Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA.\', \'Gastroenterology, Corporal Michael J Crescenz VA Medical Center, Philadelphia, Pennsylvania, USA.\', \'Department of Medicine IV, Medical University Vienna, Vienna, Austria.\', \'Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA.\', \'University of Pennsylvania Center for Clinical Epidemiology and Biostatistics, Philadelphia, Pennsylvania, USA.\']
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