Natural history of multiple sclerosis
Studies which have attempted to define the outcome ot 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...
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| Formato: | Journal article |
| Lenguaje: | English |
| Publicado: |
2001
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