 
              TMC Kollam
India 
                 King Saud Bin-Abdulaziz University
Saudi Arabia 
                 Vidyasagar University
India 
                 University of Peloponnese
Greece 
                 Rawalpindi Medical University
Pakistan 
                 Fudan University
China 
                 Cairo University
Egypt 
                 Consultor y Asesor en Enfermedades Infecciosas
Mexico 
                 Azerbaijan Medical University
Azerbaijan 
                 National Institute of Health
Pakistan 
                 Southeast University
China 
                 Southeast University
China