instruction: provide the number of patients whose gender is f and diagnoses long title is coronary atherosclerosis of autologous vein bypass graft?
response: SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic INNER JOIN diagnoses ON demographic.hadm_id = diagnoses.hadm_id WHERE demographic.gender = "F" AND diagnoses.long_title = "Coronary atherosclerosis of autologous vein bypass graft"