Robbins, J. B.; Austrian, R.; Lee, C.-J.; Rastogi, S. C.; Schiffman, G.; Henrichsen, J.; Makela, P. H.; Broome, C. V.; Facklam, R. R.; Tiesjema, R. H.; Parke, J. C.; From the Office of Biologics, Food and Drug Administration, Bethesda, Maryland; the Department of Research Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania; the Department of Microbiology, State University of New York Downstate Medical Center, Brooklyn, New York; the World Health Organization Collaborating Center for Reference and Research on Pneumococci; Statens Seruminstitut, Copenhagen, Denmark; the Central Public Health Laboratory, State Serum Institute, Helsinki, Finland; the Respiratory and Special Pathogens Branch, Center for Infectious Diseases, Centers for Disease Control, Atlanta, Georgia; the Rijks Instituut voor de Volksgezondheid, Bilthoven, the Netherlands; the Department of Pediatrics, Charlotte Memorial Hospital, Charlotte, North Carolina