FudanUniversity;
shanghai200032;
China;
ShanghaiInstituteofPlannedParenthoodResearch;
Shanghai;
200032;
China;
HenanInstituteofPlannedParenthoodResearch;
Zhengzhou;
450003;
China;
HeibeiInstituteofPlannedParenthoodResearch;
Shijiazhuang;
050025;
China;
ShanxiInstituteofPlannedParenthoodResearch;
Xi'an;
030006;
China;
ZhejiangInstituteofPlannedParenthoodResearch;
Hangzhou;
310012;
China;
GuizhouInstituteofPlannedParenthoodResearch;
Guiyang;
550004;
China;
QingdaoInstituteofPlannedParenthoodResearch;
Qingdao;
266071;
China;
TaiyuanCentersforDiseaseControlandPrevention;
Taiyuan;
030001;
China;