RT Journal Article SR Electronic T1 Exhaled gases and the potential for cross-infection via noninvasive ventilation machines JF ERJ Open Research JO erjor FD European Respiratory Society SP 00109-2022 DO 10.1183/23120541.00109-2022 VO 8 IS 3 A1 Benjamin Messer A1 Alison Dawn Armstrong A1 Nicholas David Lane A1 Ali Robb A1 Robert Edward Bullock YR 2022 UL http://openres.ersjournals.com/content/8/3/00109-2022.abstract AB