[1] Chungnam Natl Univ, Coll Nursing, Daejeon, South Korea
[2] Emory Univ, Nell Hodgson Woodruff Sch Nursing, Atlanta, GA USA
[3] Keimyung Univ, Dept Stat, Coll Nat Sci, Twegu, South Korea
[4] Chungnam Natl Univ, Dept Internal Med, Div Endocrinol & Metab, Coll Med, Daejeon, South Korea
[5] Dankook Univ, Coll Sport Sci, Cheonan, South Korea
[6] Georgia State Univ, Byrdine F Lewis Sch Nursing & Hlth Profess, Atlanta, GA USA