instruction: what is the number of patients taking drug via tp route who have other and unspecified noninfectious gastroenteritis and colitis?
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 = "Noninf gastroenterit NEC" AND prescriptions.route = "TP"