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
..
..

Different merged cells often exist in a table and they can be represented by the JSON {'top-left':(R1, C1), 'bottom-right':(R2, C2)}. In this JSON item, '(R1, C1)' and '(R2, C2)' are the (row_id, column_id) coordinates for the top-left and bottom-right cells in the merged region, respectively. Please examine the provided table image, identify all merged cells, and return their details using the above-mentioned format. Remember, the numbering for both rows and columns starts at 1.

The merged cell areas 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)}.