[1] Capital Med Univ, Beijing Childrens Hosp, Ctr Clin Epidemiol & Evidence based Med, Natl Ctr Childrens Hlth, Beijing 100045, Peoples R China
[2] Capital Med Univ, Sch Nursing, 10 Xitoutiao, Beijing 100069, Peoples R China
[3] Capital Med Univ, Beijing Childrens Hosp, Natl Ctr Childrens Hlth, Dept Nursing, Beijing 100045, Peoples R China
[4] Capital Med Univ, Minist Educ, Natl Ctr Childrens Hlth, Beijing Key Lab Pediat Hematol Oncol,Key Lab Major, 56 South Lishi Rd, Beijing 100045, Peoples R China