[1] NCI, Appl Res Program, Rockville, MD 20852 USA
[2] Univ Washington, Seattle, WA 98195 USA
[3] Grp Hlth Cooperat Puget Sound, Seattle, WA USA
[4] Henry Ford Hlth Syst, Detroit, MI USA
[5] Kaiser Permanente So Calif, Pasadena, CA USA
[6] Kaiser Permanente Colorado, Denver, CO USA