Jazayeri Seyed Behzad, Shahlaee Abtin
Students' Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran; Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.
Gastroenterology. 2013 Feb;144(2):e3-e4. doi: 10.1053/j.gastro.2012.09.005. Epub 2012 Dec 20.