1. Department of Orthopaedic Surgery, Faculty Hospital of J.A. Reiman, Holleho 14, 080-01 Presov, Slovakia
2. Institute of Histology and Embryology, Faculty of Medicine, Comenius University in Bratislava, Spitalska 24, 813-72 Bratislava, Slovakia
3. II. Department of Orthopaedic and Trauma Surgery, Faculty of Medicine, Comenius University in Bratislava, Spitalska 24, 813-72 Bratislava, Slovakia