1. Campus Clinic Brandenburg, Internal Medicine 1, Department for Angiology, Faculty of Health Sciences joint Faculty of the Brandenburg University of Technology Cottbus – Senftenberg the Brandenburg Medical School Theodor Fontane and the University of Potsdam Brandenburg an der Havel Germany
2. Charité – Universitätsmedizin Berlin corporate member of Freie Universität Berlin Humboldt‐Universität zu Berlin, and Berlin Institute of Health, Institute of Vegetative Physiology Berlin Germany