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.

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.