Demographics of patients and controls.
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*Prosthesis use: full-time = more than 8 hours a day, 7 days a week; non-full-time = never to a maximum of 4–8 hours a day, 5–7 days a week.NA = Not applicable.
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2015-12-02
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*Prosthesis use: full-time = more than 8 hours a day, 7 days a week; non-full-time = never to a maximum of 4–8 hours a day, 5–7 days a week.NA = Not applicable.