1. Department of Heart and Lang Diseases, Sahlgrenska University Hospital, Göteborg, Sweden, Correspondence address: Roland Rosmond, M.D. Department of Heart and Lung Diseases Sahlgrenska University Hospital S-413 45 Göteborg Sweden Tel: 46 31 601661, Fax: 46 31 826540
2. Department of Medicine, Sahlgrenska University Hospital, Göteborg, Sweden
3. Department of Heart and Lang Diseases, Sahlgrenska University Hospital, Göteborg, Sweden