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. Ital J Med [Internet]. 2020 May 15 [cited 2025 Jul. 1];14(3):143-50. Available from: https://www.italjmed.org/ijm/article/view/itjm.2020.1282