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Národná dlhodobá štúdia zdravotného stavu dospievajúcich (USA)
Subject h. Národná dlhodobá štúdia zdravotného stavu dospievajúcich (USA) Subject h. National Longitudinal Study of Adolescent Health Scope note in English Longitudinal study of a nationally representative sample of adolescents in grades 7-12 in the United States during the 1994-95 school year. The Add Health cohort has been followed into young adulthood. (from http://www.cpc.unc.edu/projects/addhealth accessed 08/2012) 
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