Determinants of preterm delivery in the central zone of Tigray, northern Ethiopia: A case-control study. - Wudie, F. T.; Tesfamicheal, F. A.; Fisseha, H. Z.; Weldehawaria, N. B.; Misgena, K. H.; Alema, H. B.; Gebregziabher, Y. S.; Fisseha, G. K.; Woldu, M. G. (South African Journal of Child Health, 2019)