instruction: how many male patients had the diagnosis long title atherosclerosis of native arteries of the extremities, unspecified?
response: SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic INNER JOIN diagnoses ON demographic.hadm_id = diagnoses.hadm_id WHERE demographic.gender = "M" AND diagnoses.long_title = "Atherosclerosis of native arteries of the extremities, unspecified"