The prevalence of MS in the United States

In the article "Out-of-pocket costs are on the rise for commonly prescribed neurologic medications" by Callaghan et al., 1 first published online May 1, 2019, the 2004 out-of-pocket costs for MS medications (mean [SD]) in the Abstract and Results should be $33 ($50) rather than $15 ($23), and the 2004 median/IQR in the Results should be $25 ($20-$32) rather than $14 ($10-$16). The authors regret the errors.