Quigley, E., Abdel-Hamid, H., Barbara, G., Bhatia, S., Boeckxstaens, G., De Giorgio, R., …Tzeuton, C. (2012). A global perspective on irritable bowel syndrome: a consensus statement of the world gastroenterology organisation summit task force on irritable bowel syndrome. Journal of Clinical Gastroenterology, 46(5), 356-366. https://doi.org/10.1097/mcg.0b013e318247157c