Young KA, Munroe ME, Guthridge JM, Kamen DL, Niewold TB, Gilkeson GS, Weisman MH, Ishimori ML, Kelly J, Gaffney PM, Sivils KH, Lu R, Wallace DJ, Karp DR, Harley JB, James JA, Norris JM. Combined role of vitamin D status and CYP24A1 in the transition to systemic lupus erythematosus. Ann Rheum Dis. 2017 Jan; 76(1):153-158.