NEFL and multiple sclerosis: Examples include the genes Mtor, which is a major regulator of axonal growth [51–53]; Dlg4, which encodes the protein PSD95 [54, 55]; Grin1, which encodes a critical subunit of NMDA receptors [56, 57]; the neurofilament light chain gene Nefl, which is being developed as a biomarker in traumatic SCI and multiple sclerosis [58, 59].