Khashab Mouen A, Fockens Paul, Al-Haddad Mohammad A
Division of Gastroenterology and Hepatology, Department of Medicine, The Johns Hopkins Hospital, Baltimore, Maryland 21205, USA.
Gastrointest Endosc. 2012 Nov;76(5):1024-33. doi: 10.1016/j.gie.2012.04.451. Epub 2012 Jun 28.