The natural history of multiple sclerosis.
Studies which have attempted to define the outcome of multiple sclerosis (MS) have methodologic difficulties arising from patient referral biases and the length of follow-up required, which make prospective studies of an inception cohort unrealistic. Means to improve the validity of retrospective na...
| Main Authors: | , |
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| 格式: | Journal article |
| 語言: | English |
| 出版: |
1987
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