BA, bronchial asthma; AR, allergic rhinitis; BMI, body mass index; ECP, eosinophil cationic protein; FVC, forced vital capacity; FEV1, forced expiratory volume in one second; PC20, provocative concentration of methacholine causing a 20% fall in FEV1; FeNO, fractional exhaled nitric oxide; IgE: immunoglobulin E. Here, IGHE is linked to allergic rhinitis.