Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/MDOI-GCB-02-2007-31-2-0399-8320-101019-200520001
Constipation	free resource	MedlinePlus Health Information	https://medlineplus.gov/constipation.html
	free resource	Masson (France)	http://www.em-consulte.com/retrieve/pii/MDOI-GCB-02-2007-31-2-0399-8320-101019-200520001