Local IgE in Subjects With Allergic or Non-allergic Rhinitis

"Visit 1:~* Physical examination (inspection of nasopharynx, auscultation of heart and lungs)~* Completion of a Health Questionnaire~* Lung function testing with spirometry~* Skin prick test~Visit 2:~* Physical examination (inspection of nasopharynx, auscultation of heart and lungs)~* Measurement of nitric oxide in expired air (FeNO)~* Taking nasal secretion samples with a cotton carrier for 15 min~* Nasal provocation test with dust mite~* Blood sample collection to define blood count, IgE and specific IgE"