Affiliations

• ¹ Department of Dermatology and Allergy, University of Bonn, Bonn, Germany. Electronic address: Jean-Pierre.Allam@ukb.uni-bonn.de.
• ² Department of Otorhinolaryngology, University of Dresden, Dresden, Germany; ALK-Abelló, Hamburg, Germany.
• ³ ALK-Abelló, Hamburg, Germany.
• ⁴ Center for Rhinology and Allergy, Wiesbaden, Germany.
• ⁵ Private Practice for Rhinology, Dreieich, Germany.
• ⁶ Private Practice for Rhinology, Heidelberg, Germany.
• ⁷ Institut für angewandte Statistik GmbH, Bielefeld, Germany.
• ⁸ Department of Dermatology and Allergy, University of Bonn, Bonn, Germany.