Clustering nature of hand-foot-mouth disease outbreak in kindergartens in Chengdu area in 2014    
u Liyuan, Dai Yingxue, Zhou Rong, Han Delin, Ma Lin.
Journal of Tropical Diseases and Parasitology . 2015, (4): 211 -214 .  DOI: 10.3969/j.issn.1672-2302.2015.04.008