The HLA-DRB1*15:01 allele seems to present the largest risk to MS in populations around the world including Caucasians (Patsopoulos et al. 2013), the Chinese (Qiu et al. 2011), and some populations in the Middle East (Galehdari et al. 2018) (Table 6). This evidence concerns the gene HLA-DRB1 and myeloid sarcoma.