@article {gsf02,
	title = {HALYS and QALYS and DALYS, Oh My: similarities and differences in summary measures of population Health},
	journal = {Annual review of public health},
	volume = {23},
	year = {2002},
	pages = {115},
	author = {Gold, M. R. and Stevenson, D. and Fryback, D. G.}
}
