Jang, Soong-Nang; Cho, Sung-Il; Chang, Jiyeun; Boo, Kachung; Shin, Hyun-Goo; Lee, Hyejung; Berkman, Lisa F.
ArticleIssue Date2009CitationJOURNALS OF GERONTOLOGY SERIES B-PSYCHOLOGICAL SCIENCES AND SOCIAL SCIENCES, v.64, no.5, pp 677 - 683PublisherOXFORD UNIV PRESS INC