Institute of Emergency and Critical Care Medicine, School of Medicine, National Yang-Ming University Department of Emergency Medicine, Taipei Veterans General Hospital Division of Cardiology, Department of Medicine Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center Graduate Institute of Injury Prevention and Control, College of Public Health and Nutrition, Taipei Medical University, Taipei Division of Endocrinology and Metabolism, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung Department of Emergency and Critical Medicine, Wan Fang Hospital Department of Emergency Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.