Table:
health behaviour
men
women

hazard ratio
95% confidence interval
hazard ratio
95% confidence interval

from
to
from
to

smoking

non-smoker
1.00
..
..
1.00
..
..

light smoker
1.92
1.51
2.33
1.81
1.52
2.11

heavy smoker
2.36
1.84
2.89
2.91
1.92
3.91

former smoker
1.23
1.05
1.40
1.31
1.16
1.46

body mass index (bmi), with correction

underweight
1.77
1.06
2.47
1.50
1.16
1.85

normal weight
1.00
..
..
1.00
..
..

overweight
0.87
0.79
0.95
0.86
0.78
0.94

obese i
0.96
0.85
1.07
0.91
0.80
1.02

obese ii
1.51
1.25
1.76
1.20
1.00
1.40

alcohol consumption

light or non-drinker
1.20
1.09
1.31
1.15
1.01
1.29

moderate drinker
1.00
..
..
1.00
..
..

heavy drinker
1.35
1.06
1.63
2.29
0.41
4.16

former drinker
1.65
1.46
1.83
1.56
1.36
1.75

minutes of physical activity per day

none
1.89
1.61
2.16
2.04
1.65
2.43

less than 30
1.23
1.08
1.38
1.22
1.03
1.41

30 to 60
0.99
0.86
1.12
1.10
0.92
1.28

more than 60
1.00
..
..
1.00
..
..

fruit and vegetable servings per day

none
1.93
0.49
3.36
1.71
0.57
2.85

less than 2
1.52
1.30
1.74
1.82
1.51
2.13

2 to 5
1.18
1.03
1.32
1.18
1.05
1.32

more than 5
1.00
..
..
1.00
..
..

I need you to conduct the following task:
Given this table image, find all merged table cells and return merged regions with the JSON {'top-left':(R1, C1), 'bottom-right':(R2, C2)},  where (R1, C1) and (R2, C2) indicate the (row_id, column_id) of top-left and bottom-right cells in the merged regions, respectively. You should remember that row id and column id start from 1.

The merged cell regions are as follows:
{'top-left':(1, 1), 'bottom-right':(3, 1)}
{'top-left':(1, 2), 'bottom-right':(1, 4)}
{'top-left':(1, 5), 'bottom-right':(1, 7)}
{'top-left':(2, 2), 'bottom-right':(3, 2)}
{'top-left':(2, 3), 'bottom-right':(2, 4)}
{'top-left':(2, 5), 'bottom-right':(3, 5)}
{'top-left':(2, 6), 'bottom-right':(2, 7)}
{'top-left':(4, 2), 'bottom-right':(4, 7)}
{'top-left':(9, 2), 'bottom-right':(9, 7)}
{'top-left':(15, 2), 'bottom-right':(15, 7)}
{'top-left':(20, 2), 'bottom-right':(20, 7)}
{'top-left':(25, 2), 'bottom-right':(25, 7)}.