Name Info Provider Link
subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S0006-2952(06)00320-0
Cholesterol Levels: What You Need to Know free resource MedlinePlus Health Information https://medlineplus.gov/cholesterollevelswhatyouneedtoknow.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=16876766.ui