Some of the legal websites have good links so try a search on Google.
Vit A retinol, and the tetracycline family are connected too.
You can search PubMed and find papers like this:
http://www.ncbi.nlm.nih.gov/pubmed/15675888
Use the generic name for the drug when searching. The PubMed link is at the top right of the pages here.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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