DeRusso Patricia A, Benson Jane, Lau Henry
Division of Pediatric Gastroenterology, School of Medicine, Johns Hopkins Children's Center, 600 North Wolfe Street, Brady 320, Baltimore, MD 21287, USA.
J Pediatr Gastroenterol Nutr. 2003 Feb;36(2):283-6. doi: 10.1097/00005176-200302000-00023.