Tractor seat pressure sore.
Knight
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D000382:Agricultural Workers' Diseases / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D003668:Pressure Ulcer / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology*; D012307:Risk Factors