Name	Info	Provider	Link
	subscription/membership/fee required	Chinese Medical Association Publishing House Ltd.	https://www.yiigle.com/LinkIn.do?linkin_type=pubmed&issn=0376-2491&year=2009&vol=89&issue=18&fpage=1255
Constipation	free resource	MedlinePlus Health Information	https://medlineplus.gov/constipation.html