The aim of this study was to examine the association between visual impairment from cataract and poverty in adults in Kenya, Bangladesh, and the Philippines. A population-based case–control study was conducted in three countries during 2005–2006. Cases were persons aged 50 y or...

When research takes place within the context of clinical care, how can we distinguish which activities constitute care, and which research? The editors of PLoS Medicine believe that open access to research findings is the most direct way of fulfilling the obligation towards participants to...