1. Clinic for Anesthesia, Resuscitation and Pain Management, Clinical Center of Montenegro, Podgorica, Montenegro
2. Center for Digestive Surgery, Surgical Clinic, Clinical Center of Montenegro, Podgorica, Montenegro
3. Clinic for Neurology, Clinical Center of Montenegro, Podgorica, Montenegro
4. Center for Anesthesia and Resuscitation, University Clinical Center of Serbia, Belgrade, Serbia