instruction: how many patients whose diagnoses short title is dvrtclo colon w hmrhg and drug route is iv bolus?
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.short_title = "Dvrtclo colon w hmrhg" AND prescriptions.route = "IV BOLUS"