It has been brought to our attention that Figure 7 in our recently published paper [1] contains a labeling error. The group marked "slow" should be labeled "fast" and the group marked "fast" should be labeled "slow". The corrected figure 7 is given here as Figure 1.

Figure 1
figure 1

Kaplan-Meier Survival curves by pre-progression group adjusted for age and sex. HR for slow vs. fast = 0.62 (P = 0.024).