Association between an increase in serum sodium and in-hospital mortality in critically ill patients by Grim, CCA, Termorshuizen, F, Bosman, RJ, Cremer, OL, Meinders, AJ, Nijsten, MWN, Pickkers, P, de Man, AME, Schultz, MJ, van Vliet, P, Weigel, JD, Helmerhorst, HJF, de Keizer, NF, de Jonge, E