Longer term therapy (48-54 months) resulted in stabilisation of GFR in male patients with normal baseline GFR (≥ 90 mL/ min/ 1.73 m2) and with mild to moderate renal dysfunction (GFR 60 to < 90 mL/ min/ 1.73 m2), and in slowing of the rate of decline in renal function and progression to end-stage renal disease in male Fabry patients with more severe renal dysfunction (GFR 30 to < 60 mL/ min/ 1.73 m2).