1. Department of Morphological Sciences, University of Veterinary Medicine and Pharmacy in Košice, 041 81 Košice, Slovakia
2. Educational, Scientific and Research Institute AGEL, 811 06 Bratislava, Slovakia
3. Clinic of Birds, Exotic and Free Living Animals, University of Veterinary Medicine and Pharmacy in Košice, 041 81 Košice, Slovakia
4. Division of Functional and Hybrid Systems, Institute of Materials Research of SAS, 040 01 Košice, Slovakia
5. Department of Histology and Embryology, University of Pavol Jozef Šafárik, 041 80 Košice, Slovakia
6. Clinic of Burns and Reconstructive Medicine, AGEL Hospital, 040 15 Košice-Šaca, Slovakia