Heterogeneous effects of socio-economic and cultural factors on fertility differentials in Burundi and Morocco during their fertility transition periods: a retrospective, cross-sectional and comparative study. - Nibaruta JC; Kamana B; Chahboune M; Chebabe M; Elmadani S; Turman JE Jr; Guennouni M; Amor H; Baali A; Elkhoudri N (The Pan African medical journal, 2023)