1. Division of Gastroenterology, University of Tennessee Health Science Center, Memphis, TN, USA
2. Division of Gastroenterology, Baylor College of Medicine, Houston, TX, USA
3. Division of Gastroenterology, University of Toledo, Toledo, OH, USA
4. Mulford and Carlson Libraries, University of Toledo, Toledo, OH, USA
5. Department of Medicine – Rutgers Robert Wood Johnson Medical School Rutgers, The State University of New Jersey, Robert Wood Johnson University Hospital