The anemia of the old and oldest-old patients hospitalized in Internal Medicine: a very high rate of anemia of chronic disease and multifactorial anemia oleh Federico Silvestri, Renzo Pozzo, Andrea Barbi, Antonella Labombarda, Marco Zaramella, Igor Bramuzzo, Elisa Mansutti, Laura Perale, Adolfo Rogato, Francesca Zanini