A controlled clinical trial in 1809?
Milne
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Royal College of Physicians, 9 Queen Street, Edinburgh EH2 1JQ, UK.
Chalmers
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D001815:Bloodletting / Q000266:history*; D018849:Controlled Clinical Trials as Topic / Q000266:history*; D049672:History, 19th Century; D006801:Humans; D008887:Military Medicine / Q000266:history*; D011174:Portugal