A. Usman
发表
Jamilu Ja'afar Salihu,
A. Usman,
Y. Buhari,
2020
.
M. Aminu,
Jamilu Ja'afar Salihu,
A. Usman,
2020
.
N. Umar,
J. Exley,
S. Moxon,
2018,
Journal of global health.
S. Cousens,
T. Tessema,
N. Umar,
2019,
Canadian Medical Association Journal.
N. Umar,
J. Schellenberg,
E. Allen,
2019,
Journal of global health.