... current), pack-years of cigarettessmoked, plasma folate, vit amin B6, B12, use of statinmedication (yes/no) and season and chronic disease sta-tus (cardiovascular disease, diabetes and chronic cough) ... by ROS and hasbeen associated with increased risk of cardiovasculardiseases [15,43,44]. Previous studies have shown thatvariations of HFE C282Y, HFE H63 D, HMOX-1,GSTs genes modify associations ... is a protein of 526 amino acids, encoded bythe catalase gene with 34 kb pairs of nuclear acids[65]. Catalase is the main regulator of hydrogen perox-ide metabolism [66]. Catalase enzyme mutations...