A DNA variant — located in the DNMT3B gene and commonly found in people of European and African descent — increases the likelihood of developing nicotine dependence, smoking heavily, and developing lung cancer, according to a new study.
A DNA variant — located in the DNMT3B gene and commonly found in people of European and African descent — increases the likelihood of developing nicotine dependence, smoking heavily, and developing lung cancer, according to a new study.