Date	Event	Description
28 October 2021	New citation required but conclusions have not changed	The previous lead author of the original review Pam McCormack and fellow co‐author Kevin W Southern have stepped down and two new authors, Gemma Stanford and Ruth Stewart have joined the team. Our conclusions have remained the same.
28 October 2021	New search has been performed	A search of the Cochrane Cystic Fibrosis and Genetic Disorders Review Group's Cystic Fibrosis Register and two online trials registries (Appendix 1) identified 29 individual references to 24 studies potentially eligible for inclusion in this review. One new study (two references) has been included in the updated review (Dingemans 2018).  Three references were additional references to already included studies (McIlwaine 1991; Osman 2010; Pryor 2010). Three were additional references to already excluded studies (Reix 2012; San Miguel‐Pagola 2020; Stanford 2019). We identified the full papers to two previously excluded abstracts; these have been added to the previous references and remain excluded in this updated review (San Miguel‐Pagola 2020; Stanford 2019).  There were 17 references to 14 newly excluded studies (ACTRN12611000160932; Corten 2020; CTRI/2020/10/028509; Helper 2020; NCT01854788; NCT02840136; NCT03522480; NCT03655249; NCT04187924; NCT04527796; Poncin 2017; Prusak 2020; Sokol 2012; Sokol 2012a). Three references (one full paper and two abstracts) were additional references to two studies previously listed as 'Awaiting classification' (Davies 2012; Vendrusculo 2019). Following assesment for elegibility, both studies have now been excluded in this updated review. One newly identified study has been listed as "Ongoing" and will be assessed for elegibility once results are published (NCT04010253).  We have updated the "Types of interventions" section and have added three relatively new oscillating devices not previously included. The Aerobika® is a hand‐held oscillating positive expiratory pressure device. The VibraLung® is an acoustic percussor incorporating positive expiratory pressure. Finally, the MetaNeb®  is a pneumatic compressor system delivering continuous high frequency oscillation and positive expiratory pressure.