Valderas Jose M, Mercer Stewart W, Fortin Martin
Health Services and Policy Research Group, Department of Primary Care Health Sciences, NIHR School for Primary Care Research, University of Oxford, Oxford, UK.
General Practice and Primary Care, Institute of Health and Wellbeing, University of Glasgow, Glasgow, UK.
J Comorb. 2011 Dec 27;1:1-3. doi: 10.15256/joc.2011.1.11. eCollection 2011.