1. 1 Medical Faculty, University ”St.Cyril and Metodius”, University Surgery Clinic “St.Naum Ohridski” , Department of Traumatology , Skopje , RN Macedonia
2. 2 Medical Faculty, University ”St.Cyril and Metodius” , Institute for pharmacology and toxicology , Skopje , RN Macedonia
3. 3 Medical Faculty, University ”St.Cyril and Metodius”, University Clinic for Infectious Diseases , Skopje , RN Macedonia