instruction: get the number of patients who had other body fluid lab test and have clin150 drug code.
response: SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic INNER JOIN prescriptions ON demographic.hadm_id = prescriptions.hadm_id INNER JOIN lab ON demographic.hadm_id = lab.hadm_id WHERE prescriptions.formulary_drug_cd = "CLIN150" AND lab.fluid = "Other Body Fluid"