Fryback, Dennis G.; Dunham, Nancy Cross; Palta, Mari; Hanmer, Janel; Buechner, Jennifer; Cherepanov, Dasha; Herrington, Shani A.; Hays, Ron D.; Kaplan, Robert M.; Ganiats, Theodore G.; Feeny, David; Kind, Paul
Medical Care. 45(12):1162-1170, December 2007.
doi: 10.1097/MLR.0b013e31814848f1