For each mapped variable, mousing over the displayed hospital referral regions yields the local, state, and national values for that variable.Posted by James Zellmer at June 11, 2007 10:43 AM | Subscribe to this site via RSS:It’s nicely done. There’s no question that, as of mid-2007, this is cutting-edge data interactivity for the mainstream. But times are changing fast. The Times sourced this data from the Dartmouth Atlas of Health Care.