By Honkala Sisko   Honkala Eino   Tynjälä Jorma   Kannas Lasse   in Acta Odontologica Scandinavica

ISSN:0001-6357|57|6|306-309

Informa Healthcare‎(1999)‎

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By Suominen Sakari   Välimaa Raili   Tynjälä Jorma   Kannas Lasse   in Scandinavian Journal of Public Health

ISSN:1403-4948|28|3|179-187

Informa Healthcare‎(2000)‎

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