Role of helmet loss in head injuries to USAF aircrews who ejected, 1963-1967.
D000056:Accident Prevention; D000060:Accidents, Aviation; D000337:Aerospace Medicine; D000401:Aircraft; D001924:Brain Concussion; D002056:Burns; D006259:Craniocerebral Trauma / Q000453:epidemiology; D005151:Facial Injuries; D005390:Fires; D006358:Hot Temperature; D006801:Humans; D008297:Male; D008889:Military Personnel; D011482:Protective Devices; D012887:Skull Fractures; D014887:Weather