Table 1.

Characteristics of Research Subjects

Subjects	Gender	Age (yrs)	Smoking status
1	Female	64	Smoker: 1pack/day ×  43 years
2	Male	58	Smoker: <  1/2 pack/day × 20 years
3	Female	57	Smoker: < 1pack/day × 30 years
4	Male	58	Smoker: 1/2 pack/day × 37 years
5	Female	45	Non-smoker
6	Male	45	Non-smoker
7	Female	75	Non-smoker
8	Male	63	Non- smoker