Doctors, nurses and visitors at UW Hospital's main intensive care unit are putting on gowns and gloves when seeing all patients, in a national study of whether the precautions curb infection rates. Since January, workers at UW Hospital have been using gowns and gloves for all patients in the 24-bed Trauma and Life Support Center. Visitors are being told to do the same. The hospital is one of 20 hospitals participating in a CDC-sponsored study called Benefits of Universal Glove and Gowning, or BUGG.