1. The Henry D. Janowitz Division of Gastroenterology; Icahn School of Medicine at Mount Sinai; New York NY USA
2. Division of Gastroenterology; Department of Medicine and Farncombe Family Digestive Health Research Institute; McMaster University; Hamilton ON Canada
3. Gustave L. and Janet W. Levy Library; Icahn School of Medicine at Mount Sinai; New York NY USA
4. Division of Gastroenterology; School of Health Sciences; University of Ioannina; Ioannina Greece