Affiliation: | 1. Department of Nursing, Chungbuk National University, Cheongju, Republic of Korea;2. College of Humanities and Arts, Sports and Health Care Major, Korea National University of Transportation, Chungju, Republic of Korea;1. The School of Sleep Medicine, Inc., La Honda, CA, United States;2. Michael E. DeBakey VAMC Sleep Center, Retired Houston, TX, United States |