Seeking the hidden flaw.
D001415:Back / Q000098:blood supply; D001416:Back Pain / Q000209:etiology* / Q000266:history / Q000473:pathology / Q000628:therapy; D001696:Biomechanical Phenomena; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D049690:History, Ancient; D008519:Medicine, Traditional; D009068:Movement