KIF21B and multiple sclerosis: Several studies have linked the KIF21B gene to neurodevelopmental and immune-related disorders, including multiple sclerosis and inflammatory conditions such as Crohn’s disease and ankylosing spondylitis (Anderson et al., 2009; Asselin et al., 2020; Barrett et al., 2008; Garcia-Etxebarria et al., 2016; Goris et al., 2010; International Multiple Sclerosis Genetics Consortium (IMSGC), 2010; Kannan et al., 2017; Kreft et al., 2014; Li et al., 2017; Liu et al., 2013b; Robinson et al., 2015; Yang et al., 2015).