Biofilm in chronic sinusitis with nasal polyps: pilot study - Bezerra, Thiago Freire Pinto; Pádua, Francini Grecco de melo; Ogawa, Allex Itar; Santiago, Eloisa Maria Mello; Saldiva, Paulo Hilário Nascimento; Voegels, Richard Louis (Brazilian Journal of Otorhinolaryngology, 2009)