ALB and macrophage activation syndrome: Eight widely available laboratory markers with cut-off points were selected as best for early identification of MAS: white blood cell counts ≤9.9 × 109/L, platelet counts ≤211 × 109/L, aspartate aminotransferase >59.7 U/L, lactate dehydrogenase > 822 U/L, albumin <29 g/L, ferritin >400 μg/L, fibrinogen ≤1.8 g/L and the presence of proteinuria.