At admission, 1,143 (3.9%) had profound anaemia (Hb <4g/dl); 2,326 (7.1%) had severe anaemia (Hb 4- < 6.0 g/dl) and almost one third (9,457) had moderate anaemia (6.0-8.9 g/dl). The gene discussed is GSTM1; the disease is anemia.