HPA-Axis activity in multiple sclerosis correlates with disease severity, lesion type and gene expression in normal-appearing white matter.Microglia in normal appearing white matter of multiple sclerosis are alerted but immunosuppressed.Epstein Barr virus is not a characteristic feature in the central nervous system in established multiple sclerosis.Expression of vitamin D receptor and metabolizing enzymes in multiple sclerosis-affected brain tissue.Accumulation of differentiated CD8+ and CD4+ T cells in the human brain.Phenotyping primary human microglia: Tight regulation of LPS responsiveness.