Comparison of Summer and Winter Objectively Measured Physical Activity and Sedentary Behavior in Older Adults: Age, Gene/Environment Susceptibility Reykjavik Study..

Arnardottir NY, Oskarsdottir ND, Brychta RJ, Koster A, van Domelen DR, Caserotti P, Eiriksdottir G, Sverrisdottir JE, Johannsson E, Launer LJ, Gudnason V, Harris TB, Chen KY, Sveinsson T. Int J Environ Res Public Health. 2017; 21;14(10). PMID:29065475