1. From the Medstat Inc, Washington, DC; Eli Lilly and Company, Indianapolis, IN; Medstat Inc, Cambridge, MA; MidWest Center for Health Services Research and Policy Studies, VA Chicago Health Care System, Lakeside Division, Division of Hematology/Oncology, Center for Healthcare Studies, and Cancer Control Program of the Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL