[1] Taichung Vet Gen Hosp, Dept Nursing, Taichung, Taiwan
[2] Duke Univ, Dept Populat Hlth Sci, 215 Morris St, Durham, NC 27701 USA
[3] China Med Univ, Dept Nursing, Taichung, Taiwan
[4] Natl Yang Ming Univ, Inst Publ Hlth, Taipei, Taiwan
[5] Vet Gen Hosp Taipei, Dept Surg, Taipei, Taiwan
[6] Da Yeh Univ, Dept Nursing, 168 Univ Rd, Changhua 51591, Taiwan