Coulter Ian D, Lewith George, Khorsan Raheleh, Kirk Ray, Mittman Brian
Rand Corporation, Santa Monica, CA 9040, USA.
Primary Care and Population Sciences, University of Southampton, Southampton SO16, UK.
Evid Based Complement Alternat Med. 2014;2014:780520. doi: 10.1155/2014/780520. Epub 2014 Apr 14.