1. Joel Ackelsberg, MD, is Medical Epidemiologist, Bureau of Communicable Diseases, NYC Department of Health and Mental Hygiene, New York, NY. Frederic M. Leykam, BS, is Senior Scientist; Larry C. Madsen, PhD, is Senior Scientist; Anthony Faltesek, MCRP, is a Consultant; Gavin D. Henderson, MS, is a Consultant; and Christopher L. Henderson, BA, is a Consultant; all are at the Washington Institute, Inc., McLean, Virginia. Gavin D. Henderson is also a PhD candidate in Mechanical and Aerospace Engineering at...