The authors regret the need to request a corrigendum for the above referenced article. An author (Keyoumars Ashkan) was not included as author by mistake. Prof. Ashkan contributed to development of the analysis framework and served as an investigator on the European study whose patient data were included in the pooled analysis reported in the manuscript. While study data were retained in the final analysis, no representative author from that study was included at the time of publication. As a result, Prof.
Himes et al. (Thu,) studied this question.