Overman, MJ, Pendleton, N, O’Neill, TW, Bartfai, G, Casanueva, FF, Finn, JD, Forti, G, Rastrelli, G, Giwercman, A, Han, TS, Huhtaniemi, IT, Kula, K, Lean, MEJ, Punab, M, Lee, DM, Correa, ES, Ahern, T, Verschueren, SMP, Antonio, L, Gielen, E, Rutter, MK, Vanderschueren, D, Wu, FCW, Tournoy, J, "Evaluation of cognitive subdomains, 25-hydroxyvitamin D, and 1,25-dihydroxyvitamin D in the European Male Ageing Study", European Journal of Nutrition, 2016