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The relationship between smoking and COPD is nonlinear, with diminishing impact of further pack-years of current smoking on risk of COPD, particularly for middle-to-high exposure levels (Fig

A certificate of completion may be issued for a period of three years, however such certificate shall be invalidated by a change in employment

Understanding the true factors that affect testosterone levels helps to dispel the myth that smoking has a direct impact on testosterone

Some people may need more lozenges to reduce their cravings

This increasing trend might be due to shift in preference from tobacco smoking to SLT usage due to high taxes on smoking tobacco products and low taxation on SLT products 26