[1
]
Department of Medicine, Division of Gastroenterology and Hepatology, Indiana University
School of Medicine, Indianapolis, Indiana, USA; Richard L. Roudebush Veterans Affairs
Medical Center, Indianapolis, Indiana, USA.
[2
]
Department of Medicine, Division of Gastroenterology and Hepatology, Indiana University
School of Medicine, Indianapolis, Indiana, USA.
[3
]
Department of Biostatistics, Indiana University School of Medicine, Indianapolis,
Indiana, USA.