[1] Roche Prod Ltd, Welwyn Garden City, Herts, England
[2] Beijing 302 Hosp, Beijing, Peoples R China
[3] Royal Childrens Hosp, Melbourne, Vic, Australia
[4] Sun Yat Sen Univ, Affiliated Hosp 3, Guangzhou, Guangdong, Peoples R China
[5] Kunming Med Coll, Affiliated Hosp 1, Kunming, Peoples R China
[6] Third Mil Med Univ, Southwest Hosp, Chongqing, Peoples R China
[7] Eighth Peoples Hosp Guangzhou, Guangzhou, Guangdong, Peoples R China
[8] Specialized Hosp Act Treatment Pediat Dis, Sofia, Bulgaria
[9] Med Univ Lodz, Dept Children Infect Dis, Lodz, Poland
[10] Roche China Holding Ltd, Shanghai, Peoples R China