[1] Fudan Univ, Sch Nursing, 305 Fenglin Rd, Shanghai 200032, Peoples R China
[2] Fudan Univ, Childrens Hosp, Shanghai, Peoples R China
[3] Sichuan Acad Med Sci & Sichuan Prov Peoples Hosp, Chengdu, Peoples R China
[4] Sichuan Univ, West China Hosp 2, Chengdu, Peoples R China
[5] Guangzhou Women & Childrens Med Ctr, Guangzhou, Guangdong, Peoples R China
[6] Anhui Prov Childrens Hosp, Hefei, Peoples R China
[7] Zhejiang Univ, Childrens Hosp, Sch Med, Hangzhou, Peoples R China