how does tobacco affect your circulatory system smoking starve heart of oxygen? Biology Notes for A level:

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Here we leveraged global genetic diversity across 3.4 million individuals from four major clines of global ancestry (approximately 21% non-European) to power the discovery and fine-mapping of genomic loci associated with tobacco and alcohol use, to inform function of these loci via ancestry-aware transcriptome-wide association studies, and to evaluate the genetic architecture and predictive power of polygenic risk within and across populations

Heated tobacco doesnt leave behind ash either, so theres no mess to worry about, and its less likely to stain your teeth or fingers

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