"Ng, Susanna" . . "Chu, Leo" . "10.1378/chest.08-1998" . . . "Chest" . "Chan, Matthew" . "Hall, Stephen" . "PMC7094435" . "Gin, Tony" . "19265085" . . "PMC" . "no-cc" . "2015-12-16"^^ . . . . "Exhaled Air and Aerosolized Droplet Dispersion During Application of a Jet Nebulizer" . "Hui, David" . . "19265085" . "Chow, Benny" .