No effects of oral vitamin D supplementation on non-alcoholic fatty liver disease in patients with type 2 diabetes: a randomized, double-blind, placebo-controlled trial - Barchetta, I; Del Ben, M; Angelico, F; Di Martino, M; Fraioli, A; La Torre, G; Saulle, R; Perri, L; Morini, S; Tiberti, C; Bertoccini, L; Cimini, F A; Panimolle, F; Catalano, C; Baroni, M G; Cavallo, M G (BMC Med, 2016)