Romano S, Salvaggio A, Hirata RP, Lo Bue A, Picciolo S, Oliveira LVF de, et al. Upper airway collapsibility evaluated by a negative expiratory pressure test in severe obstructive sleep apnea . Clinics [Internet]. 2011 Jan. 1 [cited 2024 Jun. 29];66(4):567-72. Available from: https://revistas.usp.br/clinics/article/view/19586