CINAHL Search Strategy via EBSCO

1.   (MH "Cystic Fibrosis")   [CINAHL Subject Heading] 2.   Cystic Fibrosis  [all text] 3.   CF   [all text] 4.   Mucoviscidosis [all text] 5.   1 or 2 or 3 or 4 6.   Sing or Singing or Singers or Song* [all text] 7.   (Vocal* or breath*) adj2 exercis* [all text] 8.   Choir* [all text] 9.   Diaphragm* adj2 breath* [all text] 10. 6 or 7 or 8 or 9 11. (MH "Clinical Trials+")  [Exploded CINAHL Subject heading] 12. Clinical trial  [publication type] 13. Random* [all text] 14. Placebo [all text] 15. Crossover or Cross‐over [all text] 16. 11 or 12 or 13 or 15 17. 5 and 10 and 16