Authors: Florence Clark; Jeanne Jackson; Mike Carlson; Chih-Ping Chou; Barbara J Cherry; Maryalice Jordan-Marsh; Bob G Knight; Deborah Mandel; Jeanine Blanchard; Douglas A Granger; Rand R Wilcox; Mei Ying Lai; Brett White; Joel Hay; Claudia Lam; Abbey Marterella; Stanley P Azen Journal: J Epidemiol Community Health Date: 2011-06-02 Impact factor: 3.710