We the editors of Cell have been informed by the Lead Contact and corresponding author of this paper, Dr. Chris Cotsapas, that further analyses following the publication of the paper have indicated that two variants (rs61999302 encoding PRKRA.D33G and rs62176112 encoding PRKRA.P11L) reported in this paper to be associated with MS risk were in fact spurious associations due to the presence of a dispersed duplication event, in which this region of chromosome 2 is duplicated in the MHC region of chromosome 6. Here, PRKRA is linked to myeloid sarcoma.