1. Department of Emergency Medicine, Stanford University, 900 Welch Road, Ste 350, Palo Alto, CA 94304, USA
2. Department of Biostatistics, Vanderbilt University Medical Center, 2525 West End Avenue, Suite 1100, Nashville, TN 37203, USA
3. Tulane University School of Medicine, 1430 Tulane Ave., New Orleans, LA 70112, USA
4. Division of Cardiovascular Medicine, Department of Medicine, Stanford University, 6453 Quarry Rd., Palo Alto, CA 94304, USA
5. Department of Emergency Medicine, Brigham and Women’s Hospital, Harvard University, 75 Francis Street, Boston, MA 02115, USA
6. Department of Emergency Medicine, Columbia University College of Physicians and Surgeons, 622 W 168th St., New York, NY 10032, USA
7. Department of Emergency Medicine, Icahn School of Medicine at Mount Sinai, 1468 Madison Ave., New York, NY 10029, USA
8. Department of Dean Administration, Oregon Health & Sciences University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, USA
9. Department of Emergency Medicine Parkland Hospital, University of Texas Southwestern Medical Center—Dallas, 5323 Harry Hines Boulevard E4.300, Dallas, TX 75390, USA
10. Department of Emergency Medicine, University of Wisconsin—Madison, 800 University Bay Dr Suite 310, Madison, WI 53705, USA
11. Department of Emergency Medicine, University of California at Davis, 2245 45th St., Sacramento, CA 95817, USA
12. Department of Emergency Medicine, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, USA