1. ”Lucian Blaga”University of Sibiu , Medicine Faculty, 550024 Sibiu, Romania
2. University of Las Palmas de Gran Canaria , Mechanical Engineering Department., , Engineering Building, 35017 Las Palmas de Gran Canaria, Spain
3. University Campus of Tafira , Mechanical Engineering Department., , Engineering Building, 35017 Las Palmas de Gran Canaria, Spain