| Recruiting | N/A | 464 | Europe | Iron, folic acid, b vitamin | Fondazione Policlinico Universitario Agostino Gemelli IRCCS | Anemia, Anemia, Iron-Deficiency, Iron Deficiency Anemia Treatment, Iron Deficiency Anemia (IDA), Cardiac Surgical Patients, Blood Loss, Surgical | 02/27 | 02/27 | | |