1. Department of Dermatology and Allergy Herlev and Gentofte Hospital Kildegårdsvej 28 2900 Hellerup Denmark
2. Department of Gastroenterology Washington University School of Medicine St Louis MO U.S.A
3. Department of Cardiology Herlev and Gentofte Hospital Kildegårdsvej 28 2900 Hellerup Denmark
4. The Danish Heart Foundation DK‐1127 Copenhagen Denmark
5. The National Institute of Public Health University of Southern Denmark DK‐1353 Copenhagen Denmark