Okunye, O., P. Idowu, B. Okanlawon, and J. Ayedun. “ A ’Triad’ of Epidemiological Factors”. Nigerian Quarterly Journal of Hospital Medicine, vol. 31, no. 3-4, Aug. 2022, pp. 67-71, https://www.ajol.info/index.php/nqjhm/article/view/229984.