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Hoffmann, A; Klein, Sabine; Gründemann, C; Garcia-Käufer, M; Wolf, Ursula; Huber, R (2016). Efficacy of a Nasal Spray from Citrus limon and Cydonia oblonga for the Treatment of Hay Fever Symptoms - A Randomized, Placebo Controlled Cross-Over Study. Phytotherapy research, 30(9), pp. 1481-1486. Wiley 10.1002/ptr.5649
