Horakova D, Cox JL, Havrdova E, Hussein S, Dolezal O, Cookfair D, Dwyer MG, Seidl Z, Bergsland N, Vaneckova M, Zivadinov R. Evolution of different MRI measures in patients with active relapsing-remitting multiple sclerosis over 2 and 5 years: a case-control study. Journal of Neurology, Neurosurgery & Psychiatry. 2008 Apr 01;79(4):407–14. doi: 10.1136/jnnp.2007.120378.