[1] Chang Gung Mem Hosp Linkou, Dept Anesthesiol, Tao Yuan, Taiwan
[2] Chang Gung Univ, Coll Med, Sch Nursing, Tao Yuan, Taiwan
[3] Chang Gung Mem Hosp Keelung, Dept Psychiat, Keelung, Taiwan
[4] Chang Gung Univ Sci & Technol, Dept Nursing, Tao Yuan, Taiwan
[5] Chang Gung Univ, Coll Med, Sch Nursing, 259,Wenhua 1st Rd, Tao Yuan 33302, Taiwan