ขอทราบจำนวนคนไข้ที่มีเพศ m และโรคหลักคือ guillain barre syndrome?ไม่จำเป็นต้องใช้ตารางทั้งหมด
give me the number of patients whose gender is m and primary disease is guillain barre syndrome?It is not neccessary to use all the tables.
 procedures:  subject_id [ text]  hadm_id [ text]  icd9_code [ text]  short_title [ text]  long_title [ text] 
SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic WHERE demographic.gender = "M" AND demographic.diagnosis = "GUILLAIN BARRE SYNDROME"