1. From the Department of Psychiatry (J.H., K.Y.K., E.K.), Institute of Behavioral Science in Medicine, and Division of Geriatrics (K.J.K.), Department of Internal Medicine, and Department of Preventive Medicine (C.M.N.), and Graduate School of Medical Science (E.K.), Brain Korea 21 FOUR Project for Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea; Cancer Big Data Center (D.-W.C.), National Cancer Control Institute, National Cancer Center, Gyeonggi-do, Republic of Korea;...