排便次数不正常？健康的便便，不一定是每天1次(2)

[2] Eswaran S L, Chey W D, Han-Markey T, et al. A randomized controlled trial comparing the low FODMAP diet vs. modified NICE guidelines in US adults with IBS-D[J]. The American journal of gastroenterology, 2016, 111(12): 1824.