1. Faculty of Health, School of Medicine, University Witten Herdecke Faculty of Health, Witten
2. Faculty of Health, University Witten Herdecke, Institute for Research in Operative Medicine, Cologne
3. Deanʼs Office, Medical College Brandenburg Theodor Fontane, Neuruppin
4. Chair of Surgical Research, Institute for Research in Operative Medicine (IFOM), Cologne