1. Saint Francis Catholic Hospital, Okpara Inland, Warri Catholic Diocesan Hospitals, Delta State, Nigeria
2. Faculty of Clinical Sciences, University of Ilorin, Ilorin, Kwara, Nigeria Academy of Public Health, West African
3. Institute of Public Health, Abuja, Nigeria Toufik’s World Medical Association, Sumy, Ukraine
4. Toufiks World Medical Association, Sumy, Ukraine Medical Institute, Sumy State University, Antonova 10, Sumy 40007, Ukraine
5. Toufik’s World Medical Association, Sumy, Ukraine Medical Institute, Sumy State University, Sumy, Ukraine