has subject area Adult Cerebrovascular Circulation Chemically-Induced Disorders - Substance Withdrawal Syndrome Computing Methodologies - Algorithms Diet, Food, and Nutrition - Chewing Gum Environment and Public Health - Surveys and Questionnaires Female Food and Beverages - Chewing Gum Health Care Evaluation Mechanisms - Surveys and Questionnaires Hemodynamics - Blood Pressure Hemodynamics - Heart Rate Humans Image Processing, Computer-Assisted Investigative Techniques - Surveys and Questionnaires Macromolecular Substances - Chewing Gum Magnetic Resonance Imaging Male Mathematical Concepts - Algorithms Mental Disorders - Substance Withdrawal Syndrome Molecular Mechanisms of Pharmacological Action - Nicotinic Agonists Neostriatum Physiological Effects of Drugs - Nicotinic Agonists Plant Exudates - Chewing Gum Polysaccharides - Chewing Gum Pyridines - Nicotine Sex Characteristics Smoking Solanaceous Alkaloids - Nicotine Thalamus Vital Signs - Blood Pressure Vital Signs - Heart Rate