Effect of adding medical or financial incentives to consenting options on personal preference and perception of norm. Open bars indicate the percentage of time the highest ranking scores (1–3) were chosen. Bars with horizontal lines indicate intermediate ranking scores (4–8) and black bars lowest ranking scores (9–11).
Hammami et al. BMC Medical Ethics 2012 13:32 doi:10.1186/1472-6939-13-32