Name Info Provider Link
Cholesterol Levels: What You Need to Know free resource MedlinePlus Health Information https://medlineplus.gov/cholesterollevelswhatyouneedtoknow.html
subscription/membership/fee required Wiley https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0903-4641&date=1991&volume=99&spage=721