Philippusstift Borbeck, St. Vincenz Hospital Stoppenberg, Prof. Dr. Biedler
Practice for Orthopedics and Trauma Surgery Velbert
Department of Orthopedics and Trauma Surgery, Dr. A. Horst
Clinic for Orthopedics and Trauma Surgery, PD Dr. F. Kutscha Lissberg
Clinic for Orthopedics and Trauma Surgery, Dr. Ch. Rülander
for Cardiology West German Heart Center University of Essen
Hand and Reconstructive Surgery, Prof. Dr. S. Ruchholtz