5 cigarettes a day pack years Was 3 a smoker. As of today I am a year smoke free : r/MadeMeSmile Meta-analysis of up to 622,409
Meta analysis of up to 622,409 individuals identifies 40 novel smoking behaviour associated genetic loci Molecular Psychiatry Smoking a pack a day for a year causes 150 mutations in lung cells How to Calculate Pack Years for Smoking Cigarettes Cancer Prevention ECU Health
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