[1] Capital Med Univ, Beijing Childrens Hosp, Nursing Dept, Beijing, Peoples R China
[2] Natl Ctr Childrens Hlth, Beijing, Peoples R China
[3] Hematol Ctr, Beijing Key Lab Pediat Hematol Oncol, Beijing, Peoples R China
[4] Capital Med Univ, Natl Key Discipline Pediat, Beijing, Peoples R China
[5] Minist Educ, Key Lab Major Dis Children, Beijing, Peoples R China
[6] Capital Med Univ, Beijing Childrens Hosp, Dept Hematol Ctr 2, Haemophilia Comprehens Care Ctr, Beijing, Peoples R China