From MEpedia, a crowd-sourced encyclopedia of ME and CFS science and history
- 40.8-45.6% of the 2073 patients in a Belgian study of 2001 reported diarrhea.
- Katrina Berne reports a prevalence of 50-90% for IBS symptoms (including diarrhea, nausea, gas, and abdominal pain).
- De Becker, P; McGregor, N; De Meirleir, K (Sep 2001), "A definition-based analysis of symptoms in a large cohort of patients with chronic fatigue syndrome.", Journal of Internal Medicine, 250 (3): 234-240, PMID 11555128
- Berne, Katrina (1 Dec 1995), Running on Empty: The Complete Guide to Chronic Fatigue Syndrome (CFIDS), 2nd ed., Hunter House, p. 58, ISBN 978-0897931915