[Effect assessment on implementing yellow card system to EPI work in Guizhou province]

Wen Du1, Yi-bin Tong, Qing Zhu

  • 1Guizhou Provincial Center for Disease Control and Prevention, Guiyang 550004, Guizhou, China

Zhongguo Yi Miao He Mian Yi
|August 24, 2010
PubMed
Abstract