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Summary Grass pollen extract adsorbed on to a suspension of L‐tyrosine has been tested over 2 years as a treatment for hay fever. Eight‐ or nine‐dose courses terminating at doses of between 1000 and 10,000 Noon units were equally effective when compared either with a placebo or with a pyridine‐extracted alum precipitate.
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MILLER et al. (1974) studied this question.
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