Young Lungs at Play: Preventing Children's Exposure to Secondhand Smoke in Outdoor Play Areas in a Steps to a HealthierNY County - Melissa Jacobson, MPH; R. Allan Beers; Devon Kessler, MPH; Una Diffley, MPH; Shelley Chanler, MA; Hailey Reid, MPH; Joan Facelle, MD, MPH (Centers for Disease Control and Prevention, 2007)