1. Center for Anesthesiology, Brandenburg Medical School, Brandenburg, Germany
2. European Foundation for Vascular & Preventive Medicine, Brandenburg, Germany
3. Department for Angiology, Center for Internal Medicine I, Brandenburg Medical School, Brandenburg, Germany
4. Institute for Pharmacology and Preventive Medicine, Cloppenburg, Germany
5. Department Angiology/Vascular Centre, Sankt Gertrauden Hospital, Berlin, Germany