[1] Natl Taiwan Univ, Dept Nursing, Taipei 10051, Taiwan
[2] Natl Taiwan Univ, Dept Med, Taipei 10051, Taiwan
[3] Natl Taiwan Univ, Dept Surg, Taipei 10051, Taiwan
[4] Natl Taiwan Univ, Dept Obstet & Gynecol, Taipei 10051, Taiwan
[5] Univ Washington, Dept Biobehav Nursing & Hlth Syst, Seattle, WA 98195 USA