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=2013&vol=93&issue=34&fpage=2733
Antibiotic Resistance free resource MedlinePlus Health Information https://medlineplus.gov/antibioticresistance.html