36
Participants
Start Date
September 24, 2018
Primary Completion Date
October 4, 2019
Study Completion Date
October 4, 2019
Nasal Provocation with Birch Extract
Nasal spray containing birch extract from Allergopharma
Nasal Provocation with NaCl 0.9%
Nasal spray containing sterile sodium chloride 0.9%
8H1.02, ENT Lab, Department of Otorhinolaryngology, Vienna General Hospital, Vienna
Medical University of Vienna
OTHER