National Research Institute for Family Planning, Beijing 100081, China;
Shangcai County Family Planning Service Centers, Shangcai County 463800, China;
Shangcai County Family Planning Service Centers, Shangcai County 463800, China;
National Research Institute for Family Planning, Beijing 100081, China;
Shangcai County Family Planning Service Centers, Shangcai County 463800, China;
Shangcai County Family Planning Service Centers, Shangcai County 463800, China;
Shangcai County Family Planning Service Centers, Shangcai County 463800, China;
Shangcai County Family Planning Service Centers, Shangcai County 463800, China;
Shangcai County Family Planning Service Centers, Shangcai County 463800, China;
Shangcai County Family Planning Service Centers, Shangcai County 463800, China;
National Research Institute for Family Planning, Beijing 100081, China;
AIDS prevention; Family planning; Needs evaluation; Knowledge; Behavior;