This is the paper referred to in this thread:
http://archfami.ama-assn.org/cgi/content/full/8/6/553
It is very interesting.
Thank you for bringing it here for people to check out!
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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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