Obu, Herbert A., Josephat M. Chinawa, Pius C. Manyike, Ikechukwu E. Obi, Ikenna K. Ndu, P. O. Nkwo, and Awoere Tamunosiki Chinawa. 2020. Innovations in Medicine and Medical Research Vol. 1, February, 97-103. https://stm1.bookpi.org/index.php/immr-v1/article/view/1012.