References
Holman, D. W., Klein, R. S. and Ransohoff, R. M. (2011) ‘The Blood-Brain Barrier, Chemokines and Multiple Sclerosis’, Biochimica et Biophysica Acta, vol. 1812, no. 2, pp. 220–30 [Online]. Available at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3005102/ (Accessed 19 April 2018).