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Mack CL, Gonzalez-Peralta RP, Gupta N, Leung D, Narkewicz MR, Roberts EA, Rosenthal P, Schwarz KB; North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition.Mack CL, et al.J Pediatr Gastroenterol Nutr. 2012 Jun;54(6):838-55. doi: 10.1097/MPG.0b013e318258328d.J Pediatr Gastroenterol Nutr. 2012.PMID: 22487950