Увеличение на броя ретикулоцити < 40 000/ μl и повишаване на Hb < 1 g/ dl
However, if the haemoglobin has increased < 1 g/ dl (< 0.62 mmol/ l) and the reticulocyte count has increased < 40,000 cells/ µl above baseline, response is unlikely and treatment should be discontinued.