@article{ref1,
title="A different approach to health state valuation",
journal="Value in health",
year="2009",
author="Kahneman, Daniel",
volume="12",
number="",
pages="S16-S17",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1098-3015",
doi="10.1111/j.1524-4733.2009.00517.x",
url="http://dx.doi.org/10.1111/j.1524-4733.2009.00517.x"
}