1. Institute for Primary Health Care (BIHAM); University of Bern; Bern Switzerland
2. Department of Ambulatory Care and Community Medicine; University Hospital; Lausanne Switzerland
3. Division of Research; Kaiser Permanente Northern California; Oakland CA USA
4. National Heart, Lung, and Blood Institute; Bethesda MD USA
5. Department of Epidemiology and Biostatistics; University of San Francisco; San Francisco CA USA
6. Department of Medicine; University of San Francisco; San Francisco CA USA
7. Northwestern University; Chicago IL USA
8. University of Alabama at Birmingham; Birmingham AL USA
9. Vanderbilt University; Nashville TN USA
10. Department of Cardiology; Kaiser Permanente Northern California; Oakland CA USA