Ravi Karthik, Sanchez William, Sweetser Seth
Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA.
Clin Gastroenterol Hepatol. 2010 Oct;8(10):e101-2. doi: 10.1016/j.cgh.2010.05.011. Epub 2010 May 23.