Chang Won Won, Keum Yeol Yang, Yong Gyun Rho, Soo Young Kim, Eun Ju Lee, Jong Lull Yoon, Kyung Hwan Cho, Ho Cheol Shin, Bi Ryong Cho, Jeong Ryul Oh, Do Kyung Yoon, Hong Soon Lee, Young Soo Lee
J Korean Geriatr Soc. 2002;6(2):107-120. Published online June 30, 2002