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Study design

Design using historical controls

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Pages 61-63 | Published online: 10 Jul 2009

Reference

  • Haverkamp LJ, Appel V, Appel SH. Natural history of amyotrophic lateral sclerosis in a database population: validation of a scoring system and a model for survival prediction. Brain 1995; 118 (Pt 3): 707–719.

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