1. Columbia-Presbyterian Medical Center; Division of General Medicine, PH-9 East Room 105; 622 West 168th Street New York NY USA 10032
2. University of Alberta; Department of Emergency Medicine; Room 1G1.43 Walter C. Mackenzie Health Sciences Centre 8440 112th Street Edmonton Alberta Canada T6G 2B7
3. Massachusetts General Hospital; EMNet Coordinating Center; 326 Cambridge St, Suite 410 Boston Massachusetts USA 02114