["HEALTH & FITNESS \/ Diseases \/ Heart","Medical \/ Diet Therapy","Cardiovascular system;Diseases;Popular works.","Cardiovascular system;Diseases;Prevention.","Nitric oxide;Physiological effect.","Cardiovascular system;Diseases;Popular works.","Cardiovascular system;Diseases;Prevention.","GENERAL","General Adult","HEALTH & FITNESS \/ Diseases \/ Heart","Health\/Fitness","Medical \/ Diet Therapy","Nitric oxide;Physiological effect.","Non-Fiction"]