"Two dozes of barks and opium": Lewis and Clark as physicians.
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D005101:Expeditions / Q000266:history*; D005197:Famous Persons; D049671:History, 18th Century; D049672:History, 19th Century; D007198:Indians, North American / Q000266:history; D008887:Military Medicine / Q000266:history; D008517:Phytotherapy / Q000266:history*; D014481:United States