[1] First Peoples Hosp Zigong City, Dept Pediat, Zigong, Sichuan, Peoples R China
[2] Southwest Med Univ, Affiliated Hosp, Dept Infect Dis, Luzhou, Sichuan, Peoples R China
[3] Southwest Med Univ, Dept Infect Dis, Affiliated Hosp, 25 Taiping St, Luzhou 646000, Sichuan, Peoples R China