Erondu, N., B. Hadgu Haile, L. Ferland, M. Park, A. Shaikh, H. Meeks, and S. J. McNabb. “Identification and Assessment of Public Health Surveillance Gaps under the IHR (2005)”. Online Journal of Public Health Informatics, vol. 5, no. 1, Mar. 2013, doi:10.5210/ojphi.v5i1.4542.