Evaluationof effects and implementation of expanded program on immunization in Guangzhou City
LI Zhi-qun, XU Jian-xiong, CAI Yan-shan, CHEN Jian, TAN Hui-feng, ZHANG Chun-huan.
S China J Prev Med . 2014, (1): 59 -62 .  DOI: 10.13217/j.scjpm.2014.0059