Clinical evaluation of spinal anaesthesia.
D000293:Adolescent; D000328:Adult; D000767:Anesthesia, Epidural; D000769:Anesthesia, Inhalation; D000775:Anesthesia, Spinal; D001004:Anus Diseases / Q000601:surgery; D005069:Evaluation Studies as Topic; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000453:epidemiology