1. Mayo Clinic, Orthopedic Surgery Rochester Minnesota USA
2. Department of Organic Chemistry Lviv Polytechnic National University, Institute of Chemistry and Chemical Technologies Lviv Ukraine
3. Department of Heat Engineering and Thermal and Nuclear Power Plants Lviv Polytechnic National University, Institute of Power Engineering and Control Systems Lviv Ukraine
4. Department of Applied Physics and Nanomaterials Science, Lviv Polytechnic National University Institute of Applied Mathematics and Fundamental Sciences Lviv Ukraine