Study design, setting and participants
The Gulhane Asthma and Allergic Rhinitis Study (GAARS) is a cross-sectional study established in 2011 in Ankara, Turkey. We recruited 510 consecutive children aged 5 to 17 who presented to the Pediatric Allergy and Asthma Unit of Gulhane Military School of Medicine and received a diagnosis of AR between 2011 and 2017. The study was approved by the institutional review board of Gulhane Military School of Medicine and written informed consent was obtained from parents. Details of the study protocol can be found elsewhere(15).