3Hosoya M, Kawasaki Y, Sato M, et al. Genetic diversity of enterovirus 71 associated with hand, foot and mouth disease epidemics in Japan from 1983 to 2003. Pediat Infect Dis J, 2006,25 (8) :691-694.
4Solomon T, Willison H. Infectious causes of acute flaccid paralysis. Curr Opin Infect Dis, 2003,16 : 375-381.