Zentrum für Rhinologie und Allergologie, Wiesbaden, Germany
Fondazione IRCCS Policlinico San Matteo, Pavia, PV, Italy
Proffesor Alain Didier, Toulouse, France
Slotervaart Ziekenhuis, Amsterdam, Netherlands
Skin and Allergy Hospital, Helsinki University Central Hospital, Helsinki, HUS, Finland
Hospital Universitario Reina Sofía, Córdoba, Spain
No.2, Chongwenmennei Street, Dongcheng District, Beijing, Beijing, China
Hospital Virgen Del Camino, Pamplona, Navarra, Spain