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=2012&vol=92&issue=39&fpage=2785
Pain	free resource	MedlinePlus Health Information	https://medlineplus.gov/pain.html