The association between circulating 25-hydroxyvitamin D metabolites and type 2 diabetes in European populations: a meta-analysis and Mendelian randomisation analysis by Zheng, J-S, Luan, J, Sofianopoulou, E, Sharp, SJ, Day, FR, Imamura, F, Gundersen, TE, Lotta, LA, Sluijs, I, Stewart, ID, Shah, RL, van der Schouw, YT, Wheeler, E, Ardanaz, E, Boeing, H, Dorronsoro, M, Dahm, CC, Dimou, N, El-Fatouhi, D, Franks, PW, Fagherazzi, G, Grioni, S, Huerta, JM, Heath, AK, Hansen, L, Jenab, M, Jakszyn, P, Kaaks, R, Kühn, T, Khaw, K-T, Laouali, N, Masala, G, Nilsson, PM, Overvad, K, Olsen, A, Panico, S, Quirós, JR, Rolandsson, O, Rodríguez-Barranco, M, Sacerdote, C, Spijkerman, AMW, Tong, TYN, Tumino, R, Tsilidis, KK, Danesh, J, Riboli, E, Butterworth, AS, Langenberg, C, Forouhi, NG, Wareham, NJ