All the patients will be re-assessed after 3 months. If no treatment is required, a second clinical evaluation with an acoustic reflection examination will be performed. If a surgical treatment or a noninvasive positive pressure ventilation will be necessary, a second complete evaluation will be performed with an endoscopic examination, the calculation of the clinical score, an acoustic reflection examination, the measurement of the work of breathing, and the recording of the nocturnal gas exchange and sleep quality. This second endoscopic examination will be performed only for medical purpose and not for research only.