1. Department of Public Health Sciences, School of Public Health, University of Hawaii, Honolulu, HI 96822
2. Communicable Disease Division, Hawaii State Department of Health, Honolulu, HI 96801
3. Preventive Medicine Service, Tripler Army Medical Center, Honolulu, HI 96859
4. U.S. Navy Environmental and Preventive Medicine Unit Number 6, Pearl Harbor, HI 96860-5040
5. U.S. Naval Medical Research Institute Detachment, Lima, Peru