Search strategy

1. dementia.ab,kw,sh,ec,ti.

2. Alzheimer.ab,kw,sh,ec,ti.

3. lewy body.ab,kw,sh,ec,ti.

4. (cognit$ or memory$ or mental$).mp. and (declin$ or impair$ or los$ or deteriorat$).ab,ti.

5. 1 or 2 or 3 or 4

6. Antibiotic$ ti,ab

7. Anti‐bacterial agents .mh

8. Doxycycl$ ti,ab, kw

9. Vibramycin ti, ab, kw

10. Monodoxin ti, ab, kw

11. Liviatin ti, ab,kw

12. Hydramycin ti, ab,kw

13. Rifampin ti, ab,kw

14. Rifampicin ti, ab,  kw

15. Fluoroquinolone$ ti, ab,kw

16. Minocycl$  ti, ab, kw

17. Antivir$ ti, ab

18. Anti‐vir$ ti, ab

19. 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18

20. randomized controlled trial$.ab,kw,sh,pt,ec,ti.

21. randomised controlled trial$.ab,kw,sh,pt,ec,ti.

22. controlled clinical trial$.ab,kw,sh,pt,ec,ti.

23. randomi$.ab,ti.

24. (double blind$ or single blind$ or triple blind$).ab,sh,ti.

25. (crossover or cross‐over).ab,ti.

26. 20 or 21 or 22 or 23 or 24 or 25

27. 19 and 26

28. Limit 27 to Human