1. Boas the founder of Gastroenterology
William S. Haubrich, M.D. 
Gastroenterology 
Volume 119, Issue 2, (August 2000)
DOI: /S (00)
Copyright © 2000 American Gastroenterological Association Terms and Conditions

2. Copyright holder unknown
Copyright holder unknown. Photo obtained from the National Library of Medicine website (
Gastroenterology  , DOI: ( /S (00) )
Copyright © 2000 American Gastroenterological Association Terms and Conditions