1Associate Professor, Department of Nursing, Eulji university, Seongnam, Korea.
2Associate Professor, Department of Nursing, Dong-A university, Busan, Korea.
© 2011 Korean Society of Nursing Science
*Including Busan, Daegu, and Ulsan.
*Including Busan, Daegu, and Ulsan; GEE=Generalized estimation equation.
*Including Busan, Daegu, and Ulsan.
*Including Busan, Daegu, and Ulsan; GEE=Generalized estimation equation.