1. College of Nursing, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul 06591, Republic of Korea
2. StatEdu Institute of Statistics 514, Knowledge Industry Center 174, Yakchon-ro, Iksan-si 54630, Republic of Korea
3. College of Nursing, Keimyung University, 1905 Dalgubeol-daero, Dalseogu, Daegu 42601, Republic of Korea
4. Department of Nursing, Suwon Science College, 288, Seja-ro, Jeongnam-myeon, Hwaseong-si 18516, Republic of Korea