1. Department of Internal Medicine; PyeongChang Health Center & County Hospital; PyeongChang Gangwon-Do Republic of Korea
2. Geriatric Center; Seoul National University Bundang Hospital; Seongnam Gyeonggi-Do Republic of Korea
3. Graduate School of Medical Science and Engineering; Korea Advanced Institute of Science and Technology (KAIST); Daejeon Republic of Korea
4. Department of Urology; PyeongChang Health Center & County Hospital; PyeongChang Gangwon-Do Republic of Korea
5. Department of Internal Medicine; Asan Medical Center; University of Ulsan College of Medicine; Seoul Republic of Korea
6. Department of Neuropsychiatry; Seoul National University Bundang Hospital; Seongnam Gyeonggi-Do Republic of Korea
7. Department of Health Promotion; PyeongChang Health Center & County Hospital; PyeongChang Gangwon-Do Republic of Korea
8. Division of Gerontology; Department of Medicine; Beth Israel Deaconess Medical Center; Harvard Medical School; Boston Massachusetts