Differential Diagnosis Can't Establish 'General Causation'

Law360, New York (June 29, 2012, 1:06 PM EDT) -- In Johnson v. Arkema Inc., the plaintiff alleged that he had developed chemical pneumonitis as a result of exposure to hydrochloric acid (HCl) and an organotin compound (monobutyltin trichloride, or MBTC) during the course of his work in a factory manufacturing glass bottles.

A fume hood made by Arkema — purchased by his employer and used to draw off HCl and organotin fumes after the substances are applied to the bottles as part of the manufacturing process — allegedly failed to work properly. The result, Johnson...
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