MN Sambo, CL Ejembi, YM Adamu, and AA Aliyu. 2005. “Out-of-Pocket Health Expenditure for under-Five Illnesses in a Semi-Urban Community in Northern Nigeria”. Journal of Community Medicine & Primary Health Care 16 (1):29-32. https://doi.org/10.4314/jcmphc.v16i1.32404.