The x-ray's link to brass music performance.
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D001317:Austria; D004867:Equipment Design; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009064:Mouth Protectors; D009146:Music / Q000266:history*; D011859:Radiography / Q000266:history*; D014481:United States; D014965:X-Rays