Air transport of critical patients in Alabama. The first four years' experience.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000401:Aircraft; D000407:Alabama; D002648:Child; D002675:Child, Preschool; D004630:Emergencies; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008875:Middle Aged; D014187:Transportation of Patients; D014947:Wounds and Injuries / Q000628:therapy*