Exhaled Nitric Oxide, Bronchial Hyperresponsiveness and Spirometric Parameters in Patients with Allergic Rhinitis during Pollen Season - Makris, Michael P; Gratziou, Christina; Aggelides, Xenophon S.; Koulouris, Sokratis P.; Koti, Ioanna; Kalogeromitros, Dimitrios C (Iranian Journal of Allergy, Asthma and Immunology)