Here's an offer that's too good to pass up:Health Affairs’ 25 Most-Read Articles From 2006To celebrate the start of Health Affairs’ 25th anniversary year, we list here the 25 most frequently viewed articles published in 2006. In 2006, Health Affairs’’ Web readership grew to 12 million pageviews.The paper on nurse staffing in hospitals by Jack Needleman and colleagues took the top spot for a paper