Demographics and clinical characteristics of the patients and controls.
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® p - value adjusted for age.‡p-value adjusted for age and pack years.*FEV1/FEV6.¥Pack years were calculated by multiplying the number of bidis smoked per day with number of years of smoking, and then dividing the product by 24 (number of bidis in a packet) [42].
创建时间：
2015-12-02
