Study	Reason for exclusion
Adde 2004	Intervention not related to the timing of hypertonic saline inhalation.
Amin 2010	Intervention not related to the timing of hypertonic saline inhalation.
Amin 2016	Intervention not related to the timing of hypertonic saline inhalation.
Aquino 2012	Intervention not related to the timing of hypertonic saline inhalation.
Balinotti 2015	Intervention not related to the timing of hypertonic saline inhalation.
Ballmann 2002	Intervention not related to the timing of hypertonic saline inhalation.
Brivio 2013	Intervention not related to the timing of hypertonic saline inhalation.
Brown 2010	Intervention not related to the timing of hypertonic saline inhalation.
Buonpensiero 2010	Intervention not related to the timing of hypertonic saline inhalation.
Cardinale 2003	Intervention not related to the timing of hypertonic saline inhalation.
Chadwick 1997	Intervention not related to the timing of hypertonic saline inhalation.
De Cono 2008	Intervention not related to the timing of hypertonic saline inhalation.
Dentice 2013	Intervention not related to the timing of hypertonic saline inhalation.
Donaldson 2003	Intervention not related to the timing of hypertonic saline inhalation.
Donaldson 2006	Intervention not related to the timing of hypertonic saline inhalation.
Donaldson 2013	Intervention not related to the timing of hypertonic saline inhalation.
Dwyer 2013	Intervention not related to the timing of hypertonic saline inhalation.
Elkins 2006c	Intervention not related to the timing of hypertonic saline inhalation.
Elkins 2006d	Intervention not related to the timing of hypertonic saline inhalation.
Eng 1996	Intervention not related to the timing of hypertonic saline inhalation.
Furnari 2012	Intervention not related to the timing of hypertonic saline inhalation.
Grasemann 2005	Did not involve administration of hypertonic saline.
Grasemann 2013	Did not involve administration of hypertonic saline.
Grieve 2003	Intervention not related to the timing of hypertonic saline inhalation.
Gupta 2012	Intervention not related to the timing of hypertonic saline inhalation.
Herrero 2016	Intervention not related to the timing of hypertonic saline inhalation.
Hofmann 1997	Intervention not related to the timing of hypertonic saline inhalation.
Homola 2013	Intervention not related to the timing of hypertonic saline inhalation.
Kobylyansky 2000	Intervention not related to the timing of hypertonic saline inhalation.
Laube 2009	Intervention not related to the timing of hypertonic saline inhalation.
Mainz 2015	Intervention not related to the timing of hypertonic saline inhalation.
Palacio 2014	Intervention not related to the timing of hypertonic saline inhalation.
Riedler 1996	Intervention not related to the timing of hypertonic saline inhalation.
Robinson 1996	Intervention not related to the timing of hypertonic saline inhalation.
Robinson 1997	Intervention not related to the timing of hypertonic saline inhalation.
Robinson 1999	Intervention not related to the timing of hypertonic saline inhalation.
Ros 2012	Intervention not related to the timing of hypertonic saline inhalation.
Rosenfeld 2012	Intervention not related to the timing of hypertonic saline inhalation.
Ruiz 2012	Intervention not related to the timing of hypertonic saline inhalation.
Suri 2002	Intervention not related to the timing of hypertonic saline inhalation.
Suri 2007	Intervention not related to the timing of hypertonic saline inhalation.
Teper 2012	Intervention not related to the timing of hypertonic saline inhalation.
Vanlaethem 2008	Intervention not related to the timing of hypertonic saline inhalation.