Ferric carboxymaltose vs. ferrous sulfate for the treatment of anemia in advanced chronic kidney disease: an observational retrospective study and cost analysis oleh Luigi Cirillo, Chiara Somma, Marco Allinovi, Alfredo Bagalà, Giuseppe Ferro, Elio Di Marcantonio, Stefania Bellelli, Lorenzo Antonio Dallari, Piercarlo Ballo, Pietro Claudio Dattolo