Table:
items
proportion of respondents experiencing the item at least once

1. receiving incoming artillery, rocket, or mortar fire
63.0

2. improvised explosive device (ied)/booby-trap exploded near you
60.1

3. having hostile reactions from civilians
57.6

4. seeing dead bodies or human remains
45.6

5. being attacked or ambushed
42.4

6. receiving small arms fire
42.0

7. having a member of your own unit become a casualty
38.9

8. working in areas that were mined or had ieds
38.8

9. witnessing an accident which resulted in serious injury or death
37.5

10. knowing someone seriously injured or killed
34.8

11. seeing dead or seriously injured canadians
34.1

12. clearing/searching homes or buildings
28.9

13. participating in ied/mine clearing
28.6

14. shooting or directing fire at the enemy
28.2

15. seeing ill/injured women or children who you were unable to help
24.2

16. having difficulty distinguishing between combatants and non-combatants
21.2

17. handling or uncovering human remains
19.8

18. being in threatening situations where you were unable to respond because of rules of engagement
19.7

19. calling fire on the enemy
13.6

20. seeing a unit member blown up or burned alive
11.9

21. clearing/searching caves or bunkers
11.4

22. had a buddy shot or hit who was near you
10.5

23. had a close call, was shot or hit but protective gear saved you
10.3

24. feeling directly responsible for the death of an enemy combatant
10.3

25. being wounded/injured
7.7

26. witnessing a friendly fire incident
7.4

27. sniper fire
7.0

28. feeling responsible for the death of canadian or ally personnel
2.6

29. feeling directly responsible for the death of a non-combatant
1.9

30. engaging in hand-to-hand combat
1.0

From the provided table image, locate any cells that are merged and list their regions as {'top-left':(x, y), 'bottom-right':(m, n)}, with (x, y) indicating the (row_id, column_id) of top-left cell and (m, n) the bottom-right cell. Both the row_id and column_id start from 1.

This table does not contain any merged cells.