In the United States a<unk>  provides Emergency medicine to trauma patients who do not need the services of a Level I or a<unk> .
A<unk>  is required to have a certain number of surgeons on call 24 hours a day.
Hospitals are designated as a<unk>  by the American College of Surgeons for a period of three years.
Level III trauma center
Level II trauma center
Level I trauma center
HAZMAT Class 1 Explosives
Subdural empyema case study one
Index case
APEX Trial
Orphan patient