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SNP associations with odds of smoking cessation, NHS participants <65 and ≥65 years old. Controlling for baseline age, year, smoking intensity (<5 or ≥5 cigarettes per day), early initiation of smoking (<16 years of age), menopausal status (for <65 years of age), and hormone replacement therapy use. SNP = Single Nucleotide Polymorphism, NHS = Nurses’ Health Study.
