O Simell, H Niinikoski, T Ronnemaa, O. T Raitakari, M Laurinen, M Aromaa, P Hakala, A Jula, E Jokinen, I Valimaki, J Viikari and for the STRIP Study Group
International Journal of Epidemiology 38 ( 3 ): 650 - 655 , 2009