1. Deapartment of Mathematics, Kalasalingam Academy of Research and Education, Krishnankoil, Tamilnadu, India
2. Department of Biomedical Sciences, Sri Ramachandra Institute for Higher Education and Research (DU), Chennai, Tamil Nadu, India
3. Faculty of Medicine, Vasile Goldis Western University of Arad, Arad, Romania
4. Faculty of Medicine, Transilvania University of Brasov, Brasov, Romania