Turner Catherine, Bain Chris, Schluter Philip J, Yorkston Emily, Bogossian Fiona, McClure Rod, Huntington Annette
School of Nursing and Midwifery, The University of Queensland, Brisbane, Australia.
Int J Epidemiol. 2009 Feb;38(1):53-60. doi: 10.1093/ije/dym294. Epub 2008 Jan 17.