1. University Clinic for Neurosurgery, Clinical Center “Mother Teresa” Skopje, Macedonia (the former Yugoslav Republic of)
2. University Clinic for Plastic, Aesthetic and Reconstructive Surgery, Clinical Center “Mother Teresa” Skopje, Macedonia (the former Yugoslav Republic of)
3. Special Hospital for Orthopedic Surgery and Traumatology “St. Erazmo” – Ohrid, Macedonia (the former Yugoslav Republic of)
4. Medical faculty, University of “Ss. Cyril and Methodius” Skopje, Macedonia (the former Yugoslav Republic of)
5. Clinic for Anesthesiology, Reanimation and Intensive Care, Clinical Center “Mother Teresa” Skopje, Macedonia (the former Yugoslav Republic of)