Alum Chris Kotsen (Clinical PsyD ‘94) has coauthored an article, “Use of Expired Air Carbon Monoxide Testing in Clinical Tobacco Treatment Settings,” published in CHEST Journal, the official publication of the American College of Chest Physicians. Carbon monoxide (CO) testing is considered an easy, noninvasive, and objective contribution to the assessment of smoking behavior, as CO is rapidly absorbed into the bloodstream when lit cigarettes or cigars are inhaled. CO testing is a medically important billable outpatient service that can contribute to sustainability of face-to-face tobacco use treatment services by clinicians. This article reviews research on the clinical use of CO testing to provide biomedical feedback in assessing smoking behavior, educating smokers on tobacco health effects, assisting with treatment planning, and as a motivational tool to encourage people to become tobacco free. Click here to access the article.