By Yeung D. Y.   Fung H. H.   Lang F. R.   in Aging and Mental Health

ISSN:1364-6915|11|1|45-56

Routledge Ltd‎(2007)‎

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By Tang C.S.-K.   Yeung D.Y.-L.   Lee A.M.   in Journal of Adolescent Health

ISSN:1054-139X|33|3|193-201

Elsevier‎(2003)‎

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