The Divers Alert Network wants you! Studies are being conducted in the hyper/hypobaric chambers of the Center for Hyperbaric Medicine and Environmental Physiology at Duke University Medical Center. Partipcants must be at least 18 years of age, and certified divers or experienced in hyper/hypobaric chamber exposures. Diving students are welcomed to particpate if they are accompanied by their instructor. (Every particpant must complete a medical questionnaire prior to the study.) To volunteer or find out more please contact the DAN Research Department at 919-684-2948, ext. 260 or via e-mail at email@example.com.