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* 1. What proportion of your MS patients have been diagnosed with SPMS?

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* 2. What proportion of your MS patients have suspected SPMS?

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* 3. What is the estimated time from suspected to diagnosed SPMS?

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* 4. What proportion of your newly-diagnosed SPMS patients have active disease (relapses and/or new MRI lesions)?

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* 5. What is your #1 criterion for an SPMS diagnosis?

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* 6. How do you determine progressive accumulation of disability in practice?

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