1. From the University of Vermont, Burlington, Vermont; Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts; Albert Einstein School of Medicine, Bronx, New York; Erasmus Medical Center, Rotterdam, the Netherlands; University of Wisconsin–Madison, Wisconsin; University of Washington School of Medicine and Group Health Research Institute, Group Health Cooperative, Seattle, Washington; University of California, Davis, School of Medicine, Davis, California;
2. Georgetown University, Washington, DC; University of California, San Francisco, California; and Dartmouth Institute for Health Policy and Clinical Practice and Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire.