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Spinal cord open‐ring enhancement in multiple sclerosis with marked effect of fingolimod - Warabi - 2016 - Clinical and Experimental Neuroimmunology - Wiley Online Library
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Evaluation of the 'ring sign' and the 'core sign' as a magnetic resonance imaging marker of disease activity and progression in clinically isolated syndrome and early multiple sclerosis - Nelly Blindenbacher, Eveline
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