คนไข้ที่วินิจฉัยชื่อสั้นว่า Therapeutic Drug Monitor และ Lab Test หมวดตรวจแก๊สในเลือดมีกี่ราย?ไม่จำเป็นต้องใช้ทุกตาราง
what is the number of patients whose diagnoses short title is therapeutic drug monitor and lab test category is blood gas?It is not neccessary to use all the tables.
 demographic:  subject_id [ text]  hadm_id [ text]  name [ text]  marital_status [ text]  age [ text]  dob [ text]  gender [ text]  language [ text]  religion [ text]  admission_type [ text]  days_stay [ text]  insurance [ text]  ethnicity [ text]  expire_flag [ text]  admission_location [ text]  discharge_location [ text]  diagnosis [ text]  dod [ text]  dob_year [ text]  dod_year [ text]  admittime [ text]  dischtime [ text]  admityear [ text] 
SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic INNER JOIN diagnoses ON demographic.hadm_id = diagnoses.hadm_id INNER JOIN lab ON demographic.hadm_id = lab.hadm_id WHERE diagnoses.short_title = "Therapeutic drug monitor" AND lab."CATEGORY" = "Blood Gas"