Folic acid supplementation during preconception period in sub-Saharan African countries: A systematic review and meta-analysis - Mekuriaw Nibret Aweke; Elsa Awoke Fentie; Muluken Chanie Agimas; Lemlem Daniel Baffa; Ever Siyoum Shewarega; Aysheshim Kassahun Belew; Esmael Ali Muhammad; Berhanu Mengistu (PLoS ONE, 2025)