IGHE and rhinitis: NAR is defined as a rhinitis with a non-IgE-mediated mechanism that includes idiopathic rhinitis (previously also called vasomotor rhinitis), infectious rhinitis, food-induced rhinitis, hormonal rhinitis, drug-induced rhinitis, non-allergic occupational rhinitis, atrophic, Eosinophilic Non-Allergic Rhinitis (ENAR) and rhinitis in elderly patients.37