Seok Yeon Kim, Cheol Ho Kim, Tae Jin Youn, Young Keun Ohn, Sang Hyun Kim, In Ho Chae, Hyo Soo Kim, Dae Won Sohn, Byung Hee Oh, Myoung Mook Lee, Young Bae Park, Yun Shik Choi, Young Woo Lee
J Korean Geriatr Soc. 1999;3(2):57-68. Published online June 30, 1999