Sumiko Koga

Underlying causes of underutilization of maternal, neonatal and child health (MNCH) services in Africa: A survey from Lagos State, Nigeria.

H. Murakami, M. Hachiya, S. Matsuoka, 2020, Global health & medicine.

Impact assessment of a maternal health project in a megacity, Nigeria: toward a future with more demand for maternal health services

K. Ohashi, S. Matsuoka, E. Suzui, 2017, The International journal of health planning and management.