1. Division of General Surgery, Department of Surgery, School of MedicineUniversity of California San Francisco San Francisco California USA
2. Department of Healthcare Leadership & ManagementMedical University of South Carolina Charleston South Carolina USA
3. Division of Biostatistics, School of Public HealthUniversity of Texas Health Science Center at Houston Houston Texas USA
4. Center for Translational Injury Research and Department of SurgeryUniversity of Texas Health Science Center at Houston Houston Texas USA
5. Division of Acute Care Surgery, Department of Surgery, Center for Injury ScienceUniversity of Alabama at Birmingham Birmingham Alabama USA