Curtis D. Malloy, MPH, is Senior Research Manager, The Washington Institute, University of Washington School of Medicine, Division of Psychiatry and Behavioral Sciences, Tacoma, Washington.

John S. Marr, MD, MPH, is Senior Lecturer, New York Medical College Graduate School of Health Sciences, Vallhalla, New York

The authors would like to extend their thanks to James Chin, MD, MPH, Clinical Professor of Epidemiology, School of Public Health, University of California, Berkeley, as well as to the staff of the American Public Health Association, particularly the generous assistance provided by Ellen Meyer, Director of Publications.