Yancey Antronette K, Sallis Robert E, Bastani Roshan
Department of Health Policy and Management, UCLA Fielding School of Public Health and Division of Cancer Prevention and Control Research, UCLA Jonsson Comprehensive Cancer Center, Los Angeles, California 90095, USA.
JAMA. 2013 Jan 9;309(2):141-2. doi: 10.1001/jama.2012.127989.