Compared effects of calcium and sodium polystyrene sulfonate on mineral and bone metabolism and volume overload in pre-dialysis patients with hyperkalemia Nakayama Y, Ueda K, Yamagishi SI, Sugiyama M, Yoshida C, Kurokawa Y, Nakamura N, Moriyama T, Kodama G, Minezaki T, Ito S, Nagata A, Taguchi K, Yano J, Kaida Y, Shibatomi K, Fukami K. Clin Exp Nephrol, 2017年