University of Cologne, Department of Orthopedics& traumasurgery, Cologne, Germany
University Center of Ophthalmology, Cologne, NRW, Germany
Department of Anaesthesiology and Postoperative Critical Care, Cologne, Germany
Department of Anaesthesiology and Postoperative Critical Care, Cologne, Germany
1st Department of Medicine, Cologne University Hospital, Cologne, Germany
University Hospital of Cologne, Cologne, Germany
University Eye Hospital, University of Cologne, Cologne, NRW, Germany
University Eye Hospital, University of Cologne, Cologne, NRW, Germany
University Eye Hospital, University of Cologne, Cologne, NRW, Germany
University of Cologne, Cologne, Germany
St Antonius Hospital Nieuwegein, Nieuwegein, Netherlands