Randomized clinical trial of vitamin D3 doses on prostatic vitamin D metabolite levels and ki67 labeling in prostate cancer patients - Wagner, D; Trudel, D; Van der Kwast, T; Nonn, L; Giangreco, A A; Li, D; Dias, A; Cardoza, M; Laszlo, S; Hersey, K (J Clin Endocrinol Metab, 2013)