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Smoking may be considered an established risk factor for sporadic ALS 

Jump to full article: Neurology, 2009-11-18
Author: Carmel Armon, MD, MHS

Intro:

Conclusions: Smoking may be considered an established risk factor for sporadic amyotrophic lateral sclerosis (ALS) (level A rating; 3 class II studies, 1 class III study). Evidence-based analysis of epidemiologic data shows concordance among results of better-designed studies linking smoking to ALS, and lets those results drive the conclusions.

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