1. Department of Dermatology; Kaiser Permanente Los Angeles Medical Center; Los Angeles CA USA
2. National Heart, Lung, and Blood Institute; National Institutes of Health; Rockville MD USA
3. University of Illinois at Chicago College of Medicine; Chicago IL USA
4. Department of Research and Evaluation; Kaiser Permanente Southern California; Pasadena CA USA
5. Department of Cardiology; The Heart Centre; Copenhagen University Hospital Rigshospitalet; Copenhagen Denmark
6. Department of Dermatology and Allergy; Herlev and Gentofte Hospital; Hellerup Denmark
7. Department of Cardiology; Odense University Hospital; Odense Denmark