El-Husseini Randa, Kaplan Marshall M
Division of Gastroenterology, New England Medical Center, Tufts University School of Medicine, 750 Washington Street, Boston, MA 02111, USA.
Am J Gastroenterol. 2004 Sep;99(9):1859-60. doi: 10.1111/j.1572-0241.2004.30408.x.