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. 2013 Dec 13;2013(12):CD009448. doi: 10.1002/14651858.CD009448.pub2
1. randomized controlled trial. pt
2.  controlled clinical trial. pt
3.  randomized. ab
4.  placebo. ab
5.  randomly. ab
6.  trial. ab
7.  groups. ab
8.  1 or 2 or 3 or 4 or 5 or 6 or 7
 
9. cystic fibrosis or CF
10.  fibrocystic adj5 disease adj5 pancreas
11.  mucoviscidos$
12.  (cystic$ adj10 fibros$)
13.  9 or 10 or 11 or 12
14. 8 and 13
 
15. physical activity
16. physical fitness
17.  habitual adj3 activity
18. exercise
19. exertion
20. sport
21. 15 or 16 or 17 or 18 or 19 or 20
22. 14 and 21
 
23. promot$
24. uptake
25. increase
26. start
27. educat$
28. program$
29. 23 or 24 or 25 or 26 or 27 or 28
30. 22 and 29