Spread of extradural analgesia following caudal injection in children.
D000328:Adult; D000763:Anesthesia, Caudal / Q000592:standards; D000767:Anesthesia, Epidural / Q000592:standards; D000768:Anesthesia, General; D002648:Child; D006801:Humans; D007223:Infant; D008297:Male; D013997:Time Factors