Recommended Diagnostic Criteria for Multiple Sclerosis: Guidelines from the International Panel on the Diagnosis of Multiple Sclerosis
Ann Neurol 50:121-127, McDonald,W.I.,et al, 2001
Chronic Progressive Multiple Sclerosis:Serial Magnetic Resonance Brain Imaging Over Six Months
Ann Neurol 26:248-256, Koopmans,R.A.,et al, 1989