1. University of Washington; Department of Medicine; Seattle WA USA
2. University of the Philippines; Section of Adult Medicine, College of Medicine; Ermita Manila Philippines 1000
3. McMaster University; Health Sciences Centre; Hamilton, Ontario Canada
4. McMaster University; Department of Medicine and Department of Clinical Epidemiology and Biostatistics; 301 James Street South Hamilton ON Canada L8P 3B6
5. University of Glasgow; British Heart Foundation Cardiovascular Research Centre; Department of Cardiology Western Infirmary Glasgow UK G11 6NT