TY  - GEN
AU  - Li,Jian
AU  - Qian,Xu
TI  - [Review and practice of decreasing maternal mortality ratio in Developed countries and Developing countries]
SN  - 0254-6450
PY  - 2016///0423
KW  - Developed Countries
KW  - Developing Countries
KW  - Humans
KW  - Maternal Mortality
N1  - Publication Type: Journal Article; Review
ER  -