Rondón, Carmen Evolution of patients with nonallergic rhinitis supports conversion to allergic rhinitis. [electronic resource] - The Journal of allergy and clinical immunology May 2009 - 1098-102 p. digital Publication Type: Journal Article ISSN: 1097-6825 Standard No.: 10.1016/j.jaci.2009.02.018 doi Subjects--Topical Terms: AdultAllergens--immunologyComorbidityFemaleHumansImmunoglobulin E--bloodMaleMiddle AgedRhinitis--epidemiologyRhinitis, Allergic, Perennial--epidemiologySkin TestsSpain--epidemiologySpirometrySurveys and Questionnaires