1. Academic Medical Center; Department of Vascular Medicine; Meibergdreef 9 Amsterdam Netherlands 1105 AZ
2. Academic Medical Center, University of Amsterdam; Department of Clinical Epidemiology, Biostatistics and Bioinformatics; P.O. Box 22700 Amsterdam Netherlands 1100 DE
3. University Medical Centre Utrecht; Department of Internal Medicine; Heidelberglaan 100 Utrecht Netherlands 3584 CX