Data Supplement

Two figures, legends, supplemental data, and one table; two jpg images and three Word documents.

Files in this Data Supplement:

• E1 - Figure 1; jpg image.
• E2 - Figure 2; jpg image.
• E3 - Figure legends; Word document.
• E4 - Supplemental data; Word document.
• E5 - E-Table 1. Percent of demyelination* caused by intracortical, leukocortical or white matter lesions in PML; Word document.