1. Division of Vascular Medicine, Ludwig-Maximilians University Hospital, Munich, Germany
2. Ulrich Hoffmann, Division of Vascular Medicine, Medizinische Poliklinik, Ludwig-Maximilians University, Pettenkoferstrasse 8a, D-80336 Munich, Germany. Tel: +49 89 5160 3590; Fax: +49 89 5160 4494; Division of Vascular Medicine, Ludwig-Maximilians University Hospital, Munich, Germany