By Heller Kenneth   Viken Richard J.   Swindle Ralph W.   in Aging and Mental Health

ISSN:1364-6915|17|2|215-225

Routledge Ltd‎(2013)‎

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By Silventoinen Karri   Kaprio Jaakko   Lahelma Eero   Viken Richard J.   Rose Richard J.   in Twin Research

ISSN:1369-0523|4|1|25-29

Australian Academic Press‎(2001)‎

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By Pagan Jason L.   Rose Richard J.   Viken Richard J.   Pulkkinen Lea   Kaprio Jaakko   Dick Danielle M.   in Behavior Genetics

ISSN:0001-8244|36|4|483-497

Springer Publishing Company ‎(2006)‎

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By Winter Torsten   Kaprio Jaakko   Viken Richard J   Karvonen Sakari   Rose Richard J   in Twin Research

ISSN:1369-0523|2|2|108-114

Australian Academic Press‎(1999)‎

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