DOI:
10.1055/s-00000019
Fortschritte der Neurologie · Psychiatrie
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References
Koch M, Kingwell E, Rieckmann P. et al.
The natural history of secondary progressive multiple sclerosis.
J Neurol Neurosurg Psychiatry 2010;
81: 1039-1043
DOI: 10.1136/jnnp.2010.208173.
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