1. College of Nursing, University of Eulji, Uijeongbu 11759, Republic of Korea
2. Division of Endocrinology, Department of Internal Medicine, Daejeon Eulji Medical Center, Eulji University School of Medicine, Daejeon 35233, Republic of Korea
3. Department of Nursing, Gyeongbuk College of Health, Gimcheon 39525, Republic of Korea