1. a Health Programs , Portland State University , Portland , OR , 97207 , USA
2. b School Health Programs, U.S. Office of Disease Prevention and Health Promotion , USA
3. c School Health Initiative, Office of Disease Prevention and Health Promotion, U.S. Public Health Service , Washington , D.C , 20201 , USA
4. d Office of Disease Prevention and Health Promotion, U.S. Public Health Service , Washington , D.C. , 20201 , USA