Comorbidites in severe asthma: frequency of rhinits, nasal, polyposis,gastroesophageal reflux disease, vocal cord dysfunction and bronchiectasis - Bisaccioni, Carla; Aun, Marcelo Vivolo; Cajuela, Edcarlos; Kalil Filho, Jorge Elias; Agondi, Rosana Câmara; Bianchi, Pedro Giavina (Clinics, 2009)