FP352COMBINED LOW STATUS OF VITAMIN D AND VITAMIN K IS ASSOCIATED WITH ALL-CAUSE MORTALITY AND PREMATURE GRAFT FAILURE IN STABLE KIDNEY TRANSPLANT RECIPIENTS. (18th May 2018) - van Ballegooijen, Hanne; Vervloet, Marc; Beulens, Joline; Keyzer, Charlotte; Navis, Gerjan; Berger, Stefen; de Borst, Martin; Bakker, Stephan