American | American Civil War | American Broadcasting Company | American football | African American | American Idol | American Revolutionary War | college football | American Revolution | Eton College | University College London | Dartmouth College | American Association for the Advancement of Science | American Red Cross | King's College London | Harvard College | American Library Association | American Museum of Natural History | Trinity College | American Express | American Academy of Arts and Sciences | American League | American Association | American Heart Association | college | American comic book | American Institute of Architects | American Airlines | Oberlin College | Boston College |
He is past president of the New York Society for Gastrointestinal Endoscopy and New York Academy of Gastroenterology and has served on the board of the American College of Gastroenterology.