1. exp interstitial lung disease/

2. exp lung 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. (bronchiolitis adj3 obliterans).tw.

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

9. granulomatosis.tw.

10. histiocytosis$.tw.

11. (pneumoconiosis or pneumokoniosis 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 systemic sclerosis/

21. scleroderma.tw.

22. exp rheumatic disease/

23. rheumatic$.tw.

24. or/20‐23

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

26. 19 or 25

27. oxygen/ct, ad, cb, cm, cr, do, it, dt, to, ih, th [Clinical Trial, Drug Administration, Drug Combination, Drug Comparison, Drug Concentration, Drug Dose, Drug Interaction, Drug Therapy, Drug Toxicity, Inhalational Drug Administration, Therapy]

28. exp oxygen 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. exp ambulatory care/

32. or/27‐31

33. 26 and 32

34. Randomized Controlled Trial/

35. randomization/

36. controlled clinical trial/

37. Double Blind Procedure/

38. Single Blind Procedure/

39. Crossover Procedure/

40. (clinica$ adj3 trial$).tw.

41. ((singl$ or doubl$ or trebl$ or tripl$) adj3 (mask$ or blind$ or method$)).tw.

42. exp Placebo/

43. placebo$.ti,ab.

44. random$.ti,ab.

45. ((control$ or prospectiv$) adj3 (trial$ or method$ or stud$)).tw.

46. (crossover$ or cross‐over$).ti,ab.

47. or/34‐46

48. exp animals/ or exp invertebrate/ or animal experiment/ or animal model/ or animal tissue/ or animal cell/ or nonhuman/

49. human/ or normal human/ or human cell/

50. 48 and 49

51. 48 not 50

52. 47 not 51

53. 33 and 52