1. exp Lung Diseases, Interstitial/

2. exp Pulmonary Fibrosis/

3. (interstitial$ adj3 (lung$ adj3 disease$)).tw.

4. (interstitial$ adj3 (fibros$ or pneumonitis or pneumonia or pneumopathy)).tw.

5. (diffuse* adj3 parenchymal*).tw.

6. alveolitis.tw.

7. exp Bronchiolitis Obliterans/ or (bronchiolitis adj3 obliterans).tw.

8. (goodpasture$ adj3 syndrome$).tw.

9. granulomatosis.tw.

10. exp Histiocytosis/ or histiocytosis$.tw.

11. exp Pneumoconiosis/ or pneumoconiosis.tw. or pneumokoniosis.tw. or pneumonoconiosis.tw.

12. bagassosis.tw.

13. (pulmonary$ adj3 sarcoid$).tw.

14. (pulmonary$ adj3 fibros$).tw.

15. (wegener$ adj3 granuloma$).tw.

16. (lung$ adj3 purpura).tw.

17. ((bird$ or farmer$ or pigeon$ or avian$ or budgerigar$) adj3 (lung$ or disease$)).tw.

18. (asbestosis or byssinosis or siderosis or silicosis or berylliosis or anthracosilicosis or silicotuberculosis).tw.

19. or/1‐18

20. exp Scleroderma, Systemic/

21. scleroderma.tw.

22. exp Rheumatic Diseases/

23. rheumatic$.tw.

24. or/20‐23

25. 24 and (lung$ or pulmonary$ or respiratory$).tw.

26. 19 or 25

27. Oxygen/ad, tu [Administration & Dosage, Therapeutic Use]

28. exp Oxygen Inhalation Therapy/

29. (oxygen$ adj3 (therap$ or ambulat$ or portable$ or short$ or burst$ or inhal$)).tw.

30. (oxygen$ adj5 (palliative$ or symptom$ or exercis$)).tw.

31. Ambulatory Care/

32. or/27‐31

33. 26 and 32

34. (controlled clinical trial or randomised controlled trial).pt.

35. (randomised or randomised).ab,ti.

36. placebo.ab,ti.

37. dt.fs.

38. randomly.ab,ti.

39. trial.ab,ti.

40. groups.ab,ti.

41. or/34‐40

42. Animals/

43. Humans/

44. 42 not (42 and 43)

45. 41 not 44

46. 33 and 45