Zubairu, Asimau, Kehinde Oladigbolu, Hawwa Abdullahi, Elijah Peter, Halima Abdulsalam, and Hafsatu Suleiman. “Serum Vitamin A Levels and Xerophthalmia Among Children With Protein Energy Malnutrition in Zaria, Northwest Nigeria”. Nigerian Medical Journal 66, no. 3 (September 19, 2025): 983–989. Accessed May 13, 2026. https://nigerianmedjournal.org/index.php/nmj/article/view/756.