Epidemiology in anaesthesia. I: Anaesthetic practice over 20 years.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000758:Anesthesia / Q000379:methods / Q000401:mortality; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008499:Medical Records; D008875:Middle Aged; D011182:Postoperative Care; D011229:Preanesthetic Medication; D011247:Pregnancy; D011300:Preoperative Care; D013514:Surgical Procedures, Operative; D014852:Wales