1. Queen's University; Department of Medicine and of Community Health and Epidemiology; Etherington Hall-Room 2066 Kingston Ontario Canada K7L 3N6
2. University of Maryland; School of Medicine; 10 S Pine St MSTF 8-34 Baltimore MD USA 21201
3. University of Ottawa; Institute of Population Health; 1 Stewart St. Room 312 Ottawa Ontario Canada K1N 6N5
4. University of Ottawa Heart Institute; Cardiovascular Research Reference Centre; Room H1-1 40 Ruskin Street Ottawa Ontario Canada K1Y 4W7