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Kositz C, Schroecksnadel K, Grander G, Schennach H, Kofler H, Fuchs D. High serum tryptophan concentration in pollinosis patients is associated with unresponsiveness to pollen extract therapy. Int Arch Allergy Immunol. 2008;147(1):35–40. doi: 10.1159/000128584. PMID: 18446051. |