Thakkar Kalpesh, El-Serag Hashem B, Mattek Nora, Gilger Mark
Section of Pediatric Gastroenterology, Hepatology and Nutrition, Texas Children's Hospital and Baylor College of Medicine, Houston, Texas, USA.
Clin Gastroenterol Hepatol. 2008 May;6(5):515-20. doi: 10.1016/j.cgh.2008.01.007. Epub 2008 Mar 20.