[1] Fudan Univ, Sch Nursing, Shanghai, Peoples R China
[2] Anhui Prov Childrens Hosp, Hefei, Anhui, Peoples R China
[3] Sichuan Acad Med Sci, Chengdu, Sichuan, Peoples R China
[4] Sichuan Prov Peoples Hosp, Chengdu, Sichuan, Peoples R China
[5] Fudan Univ, Childrens Hosp, Shanghai, Peoples R China
[6] Zhejiang Univ, Sch Med, Childrens Hosp, Hangzhou, Zhejiang, Peoples R China
[7] Guangzhou Women & Childrens Med Ctr, Guangzhou, Guangdong, Peoples R China