1. James Weinstein ( ) is professor and chairman of the Department of Orthopaedic Surgery, Dartmouth Medical School, Dartmouth-Hitchcock Medical Center, in Lebanon, New Hampshire. Kristen Bronner is a research associate at the Center for the Evaluative Clinical Sciences, Dartmouth Medical School. Tamara Morgan is a research associate in the Department of Orthopaedic Surgery, Dartmouth Medical School. John Wennberg is director of the Center for the Evaluative Clinical Sciences and the Peggy Y....