[1] Manchester Royal Infirm, Vaccine Evaluat Unit, Hlth Protect Agcy, Manchester M13 9WZ, Lancs, England
[2] Ctr Dis Control & Prevent, Atlanta, GA USA
[3] US FDA, Bethesda, MD 20014 USA
[4] Natl Inst Biol Stand & Controls, Potters Bar EN6 3QG, Herts, England
[5] Inst Environm Sci, Porirua, New Zealand
[6] Walter Reed Army Inst Res, Washington, DC USA
[7] NICHHD, NIH, Bethesda, MD 20892 USA
[8] Norwegian Inst Publ Hlth, NO-0403 Oslo, Norway
[9] Childrens Hosp Oakland, Res Inst, Oakland, CA 94660 USA
[10] Hlth Protect Agcy Ctr Infect, London NW9 5EQ, England
[11] Netherlands Vaccine Inst, NL-3720 AL Bilthoven, Netherlands
[12] GlaxoSmithKline Biol, Rixensart, Belgium
[13] Chiron Vaccines, Siena, Italy
[14] Chiron Vaccines, Emeryville, CA 94608 USA
[15] Wyeth Vaccines, Pearl River, NY 10965 USA
[16] Sanofi Pasteur, F-69280 Marcy Letoile, France
[17] Merck & Co Inc, West Point, PA 19486 USA
[18] WHO, CH-1211 Geneva 27, Switzerland
[19] Emory Univ, Dept Med, Atlanta, GA 30322 USA