[1] Hainan Med Univ, Int Nursing Sch, Haikou 571199, Hainan, Peoples R China
[2] Peking Union Med Coll, Sch Nursing, 33 Ba Da Chu Rd, Beijing 100144, Peoples R China
[3] Univ Nebraska Med Ctr, Coll Nursing, Lincoln, NE 68503 USA
[4] Tongji Hosp, Dept Obstet & Gynecol, Wuhan 430030, Hubei, Peoples R China
[5] Tianjin Med Univ Canc Inst & Hosp, Dept Lung Canc, Tianjin 300202, Peoples R China
[6] Tiancun Rd Community Hlth Serv Ctr, Dept Psychiat, Beijing 100049, Peoples R China