Kearney Patricia M, Harrington Janas M, Mc Carthy Vera J C, Fitzgerald Anthony P, Perry Ivan J
Department of Epidemiology and Public Health, University College Cork, Cork, Ireland.
Int J Epidemiol. 2013 Oct;42(5):1253-62. doi: 10.1093/ije/dys131. Epub 2012 Sep 14.