Chinese vs. American acupuncture.
D015670:Acupuncture Therapy / Q000266:history*; D001416:Back Pain / Q000628:therapy; D002681:China; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008722:Methods; D012585:Sciatica / Q000628:therapy; D014481:United States