1. Department of Cardiology, Thorax Centre, University of Groningen, University Medical Centre Groningen, 9700 RB Groningen, The Netherlands
2. Department of Internal Medicine, University of Groningen, University Medical Centre Groningen, 9700 RB Groningen, The Netherlands
3. Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Centre Groningen, 9700 RB Groningen, The Netherlands