1. Mayo Clinic, Department of Emergency Medicine, Rochester, Minnesota
2. Mayo Clinic, Department of Emergency Medicine, Rochester, Minnesota Federal University of Rio Grande do Sul, Department of Medicine, Rio Grande do Sul
3. Mayo Clinic, Division of Biomedical Statistics and Informatics, Rochester, Minnesota
4. Mayo Clinic, Department of Anesthesiology & Perioperative Medicine, Rochester, Minnesota
5. Mayo Clinic, Department of Emergency Medicine, Rochester, Minnesota; The First Affiliated Hospital of China Medical University, Department of Emergency Medicine, Liaoning, Shenyang