Spinal analgesia and headache at Penang General Hospital.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000775:Anesthesia, Spinal / Q000009:adverse effects*; D005260:Female; D006261:Headache / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011187:Posture