[1] Univ Hong Kong, Sch Nursing, Pok Fu Lam, Hong Kong, Peoples R China
[2] Yonsei Univ, Mo Im Kim Nursing Res Inst, Coll Nursing, Seoul, South Korea
[3] Univ Edinburgh, Usher Inst, Ctr Populat Hlth Sci, Edinburgh, Scotland
[4] Yonsei Univ, Coll Nursing, Seoul, South Korea
[5] Yonsei Univ, Coll Nursing, 50-1 Yonsei Ro, Seoul 03722, South Korea