instruction: provide the number of patients whose diagnoses long title is hematoma complicating a procedure and drug type is additive?
response: SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic INNER JOIN diagnoses ON demographic.hadm_id = diagnoses.hadm_id INNER JOIN prescriptions ON demographic.hadm_id = prescriptions.hadm_id WHERE diagnoses.long_title = "Hematoma complicating a procedure" AND prescriptions.drug_type = "ADDITIVE"