[1] Capital Med Univ, Sch Nursing, Beijing 100069, Peoples R China
[2] Capital Med Univ, Beijing Shijitan Hosp, Dept Breast Oncol, Beijing, Peoples R China
[3] Jinan Univ, Sch Nursing, Guangzhou, Peoples R China
[4] Univ Pittsburgh, Sch Nursing, 3500 Victoria St, Pittsburgh, PA 15261 USA
[5] Univ Pittsburgh, Palliat Res Ctr PaRC, 230 McKee Pl, Pittsburgh, PA 15213 USA