Rhinitis, Allergic

• Hospital General de Ciudad Real — Ciudad Real, Spain
• Clinica Ojeda — Madrid, Spain
• Clinica Subiza — Madrid, Spain
• Complejo Hospitalario de Navarra — Pamplona, Navarre, Spain

Not specified

• Vienna Challenge Chamber — Vienna, Austria

• Arkansas Medical Research Testing Center — Little Rock, Arkansas, United States

• Araya Satdabudha — Klong Luang, Pratumthanee, Thailand

• Allergie-Centrum Charité, Klinik für Dermatologie, Venerologie und Allergologie, Charité Campus Mitte, Universitätsmedizin Berlin — Berlin, Germany
• Hals, Nasen- und Ohrenheilkunde — Berlin, Germany
• Allergy & Asthma Center Westend — Berlin, Germany
• Universitätsklinikum Düsseldorf — Düsseldorf, Germany

• Department of Pediatrics and Allergy, Medical University of Lodz, Poland — Lodz, Łódź Voivodeship, Poland

• Zentrum für Rhinologie und Allergologie — Wiesbaden, Germany

• HNO-Praxis Dr. Pasch/Prof. Schlöndorff — Aachen, North Rhine-Westphalia, Germany

• Vienna Challenge Chamber — Vienna, Austria