The study did not show statistically significant results on the primary efficacy parameter at month 12 (15-letter responder rate 62.7% versus 55.0%, p=0.150; 30-letter responder rate 84.0% versus 83.3%, p=0.868) or at month 24 (15-letter responder rate 53.3% versus 47.5%, p=0.300; 30- letter responder rate 77.5% versus 75.0%, p=0.602).