[1] China Med Univ, Dept Hlth Serv Adm, Taichung, Taiwan
[2] Minist Hlth & Welf, Dept Nursing & Hlth Care, 488,Sect 6,Zhongxiao E Rd, Taipei 115, Taiwan
[3] Univ Pittsburgh, Sch Nursing, 3500 Victoria Bldg, Pittsburgh, PA 15261 USA
[4] Dayeh Univ, Coll Nursing & Hlth Sci, 168 Univ Rd, Dacun 51591, Changhua, Taiwan
[5] Natl Yang Ming Univ, Sch Nursing, 155 Sect 2,Linong St, Taipei 112, Taiwan
[6] Tungs Taichung MetroHarbor Hosp, Taichung, Taiwan