Association of positive end expiratory pressure to ultrasonic nebulizer: effect on aerosol deposition onto lungsThis study aimed at comparing aerosol deposition onto lungs using an ultrasonic (US) nebulizer, with and without using a positive end expirator. Fisioter Pesqui. 2007;14(1):29-35. doi:10.1590/fpusp.v14i1.75502