[1] Chang Gung Mem Hosp, Dept Nursing, Taoyuan, Taiwan
[2] Chang Gung Univ, Chang Gung Childrens Hosp, Div Hematol & Oncol, Dept Pediat, Univ,5 Fu Shin St, Taoyuan 33305, Taiwan
[3] Chang Gung Childrens Hosp, Dept Pediat Surg, Taoyuan, Taiwan
[4] Chang Gung Univ, Chang Gung Mem Hosp, Dept Pathol, Taoyuan, Taiwan
[5] Chang Gung Univ, Dept Publ Hlth & Ctr Biostatist, Coll Med, Taoyuan, Taiwan