Red meat, poultry and fish consumption and risk of diabetes: a 9 year prospective cohort study of the China Kadoorie Biobank by Du, H, Guo, Y, Bennett, DA, Bragg, F, Bian, Z, Chadni, M, Yu, C, Chen, Y, Tan, Y, Millwood, IY, Gan, W, Yang, L, Yao, P, Luo, G, Li, J, Qin, Y, Lv, J, Lin, X, Key, T, Chen, J, Clarke, R, Li, L, Chen, Z, China Kadoorie Biobank collaborative group