Okwara, E. C., & Wakwe, V. C. (2023). Serum Levels of Zinc and Copper in the Elderly in Owerri Metropolis: https://doi.org/10.60787/NMJ-64-1-234. Nigerian Medical Journal, 64(1), 130. https://doi.org/10.60787/nmj.v64i1.234