[1] Hebei Univ, Sch Nursing, Baoding, Hebei, Peoples R China
[2] Hebei Univ, Affiliated Hosp, Dept Breast Surg, Baoding, Hebei, Peoples R China
[3] Hebei Univ, Affiliated Hosp, Dept Med Oncol, Baoding, Hebei, Peoples R China
[4] Peking Univ, Sch Nursing, Div Med & Surg Nursing, Beijing, Peoples R China