Date	Event	Description
12 June 2017	Amended	Error in Abstract corrected ‐ a sentence referring to a previously included study, which was excluded at the 2017 update (Orlik 2001), had been left in the Results section of the Abstract; this sentence has now been removed.
26 April 2017	New search has been performed	A search of the Cystic Fibrosis and Genetic Disorders Review Group's Cystic Fibrosis Trials Register identified 15 references to 10 studies for possible inclusion in this update of the review. A total of three new studies have been included at this update. Two were newly identified studies (one reference each) (Khan 2014; West 2010) and one further reference was an additional reference to a study previously listed as 'Awaiting classification' which is now also included (Davies 2012). One study was only available in abstract form (two references) and has been listed as 'Awaiting classification' until further details are available to allow a judgement on inclusion or exclusion (Herrero 2016). 10 references to six studies were excluded (Amelina 2014; Dwyer 2017; Fainardi 2011; Grosse‐Onnebrink 2017; Kempainen 2007; O'Neil 2017). Following communication with the authors of the previously included Orlik studies, we established that there were no random elements in the allocation procedure of these studies. These therefore do not meet the review's inclusion criteria and have been excluded at this 2017 update (Orlik 2000a; Orlik 2000b; Orlik 2001).
26 April 2017	New citation required but conclusions have not changed	Despite the inclusion of new studies, our conclusions remain the same. Jennifer Agnew has stepped down from the review team and a new author, Stephanie Innes, has joined.
11 August 2014	Amended	An error in the text of the plain language summary has been corrected.
17 July 2014	New search has been performed	A search of the Group's Cystic Fibrosis Trials Register identified 14 new references. A further study was identified through further hand searching (Borka 2012). Two of the new references were additional references to already included studies (Lyons 1992; Modi 2006a). One new study (five references) has been included (McIlwaine 2013). Five studies,with single references to each, were excluded (Borka 2012; Dosman 2003; Dunn 2013; Jarad 2010; Van Ginderdeuren 2008). Three new studies have been listed as 'Awaiting classification' (Davies 2012a; Patel 2013; Wheatley 2013). A reference previously listed under 'Studies awaiting classification' was an additional reference to an already included study (Modi 2006a). In the 'Types of interventions' we have included two new types of devices that have recently come onto the market, both of which have an oscillatory component to their function. The VibraLung (VL) is an acoustic percussor and incorporates positive expiratory pressure. The MetaNeb is a pneumatic compressor system delivering continuous high frequency oscillation and positive expiratory pressure.
17 July 2014	New citation required but conclusions have not changed	Despite the inclusion of a new study with 92 participants, the conclusions of our review remain the same (McIlwaine 2013).
3 December 2010	New search has been performed	A search of the Group's Cystic Fibrosis Trials Register identified three new references to two new studies (Grzincich 2008; Kraemer 1996). We included the Grzincich study as this compared HFCWO with PEP (Grzincich 2008). We excluded the two references to the Kraemer study as they did not compare oscillation with another form of physiotherapy treatment (Kraemer 1996). We identified the full paper to a previously identified abstract and this now supercedes all previous references and has been included in this review (Osman 2010). We also identified the full paper to another previously included study (Modi 2006a) and this is listed as 'Awaiting classification' until the next update when we will include any new data. Three studies which were listed as 'Awaiting classification' have now been translated and assessed for eligibility.These studies were included in this updated review (Orlik 2000c; Orlik 2000c; Orlik 2001a).
10 November 2008	Amended	Converted to new review format.