Irena Pesis-Katz is with the School of Nursing, University of Rochester, Rochester, NY. Charles E. Phelps, Helena Temkin-Greener, and Peter Veazie are with the Department of Public Health Sciences, University of Rochester. William D. Spector is with the Agency for Healthcare Research and Quality, Rockville, MD. Dana B. Mukamel is with the Department of Medicine and Health Policy Research Institute, University of California, Irvine.