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2. American Trauma Society. Trauma center levels explained. Available at: http://www.amtrauma.org/?page=traumalevels. Accessed September 26, 2017
3. American College of Surgeons. Resources for optimal care of the injured patient. Available at: https://www.facs.org/∼/media/files/quality%20programs/trauma/vrc%20resources/clarification_document.ashx. Accessed September 26, 2017