References:
Ghoshal UC, Abraham P, Bhatia SJ, et al. Comparison of Manning, Rome I, II, and III, and Asian diagnostic criteria: report of the Multicentric Indian Irritable Bowel Syndrome (MIIBS) study. Indian J Gastroenterol. 2013;32(6):369-375.
Manning AP, Thompson WG, Heaton KW, Morris AF. Towards positive diagnosis of the irritable bowel. Br Med J. 1978;2(6138):653-465.