Affiliation: | 1.Division of Gastroenterology, University of Tennessee Health Science Center, Memphis, TN, USA ;2.Division of Gastroenterology, University of Alabama at Birmingham, Birmingham, AL, USA ;3.Mulford Health Sciences Library, University of Toledo, Toledo, OH, USA ;4.Department of Medicine, University of Toledo, Toledo, OH, USA ;5.Division of Gastroenterology, Geisinger Medical Center, Danville, PA, USA ;6.Division of Gastroenterology, University of Utah, Salt Lake City, UT, USA ;7.Department of Medicine, Louis A Weiss Memorial Hospital, Chicago, IL, USA ; |