Cabieses, Baltica; PhD, Lecturer at Universidad del Desarrollo, Chile; Visiting Scholar at University of York, England;; Tunstall, Helena; PhD, Research Fellow at University of Edinburgh, Scotland; htunsta2@staffmail.ed.ac.uk; Kate, Pickett; PhD, Professor of Epidemiology at University of York, England; kate.pickett@york.ac.uk. Revista Médica de Chile; Vol. 141, núm. 10 (2013): OCTUBRE 2013