Database or Resource	Search strategy
ClinicalTrials.gov (www.clinicaltrials.gov/)	(Cystic Fibrosis OR CFTR) AND (rhinitis OR sinusitis OR rhinosinusitis)
WHO ICTRP (apps.who.int/trialsearch/Default.aspx)	(Cystic Fibrosis OR CFTR) AND (rhinitis OR sinusitis OR rhinosinusitis)
European Union (EU) Clinical Trials Register (www.clinicaltrialsregister.eu/)	(Cystic Fibrosis OR CFTR) AND (rhinitis OR sinusitis OR rhinosinusitis)
PubMed	(Cystic Fibrosis OR CFTR) AND (rhinitis OR sinusitis OR rhinosinusitis) AND (randomised control trial OR RCT OR review OR narrative review OR systematic review OR meta‐analysis)
Ovid Embase	(Cystic Fibrosis OR CFTR) AND (rhinitis OR sinusitis OR rhinosinusitis) AND (randomised control trial OR RCT OR review OR narrative review OR systematic review OR meta‐analysis)
the Cochrane Library	(Cystic Fibrosis OR CFTR) AND (rhinitis OR sinusitis OR rhinosinusitis) AND (randomised control trial OR RCT OR review OR narrative review OR systematic review OR meta‐analysis)
Google Scholar	(Cystic Fibrosis OR CFTR) AND (rhinitis OR sinusitis OR rhinosinusitis) AND (randomised control trial OR RCT OR review OR narrative review OR systematic review OR meta‐analysis)