Inclusion Criteria:  Patients  with antineoplastic therapy (chemotherapy or "new substances"), radiochemotherapy or radiotherapy in the period 1/1/2021 - 06/30/2021 with anemia with hemoglobin levels decreases below 10g/dl (6.2 mmol/l) at least once during the period 1/1/2021 - 06/30/2021 with at least 4 weeks of follow up period after anemia diagnosis.  Exclusion Criteria:  Follow up time less than 4 weeks, lack of patient contact after anemia diagnosis