TABLE 1.

Laboratories participating in the multicenter pneumococcal ELISA study and number of antibody determinations for each serum sample submitted for analysis

Laboratory	No. of assays
CDC, Atlanta, Ga. (manual)	1
CDC, Atlanta, Ga. (robot)	3
Food and Drug Administration, Center for Biologics Evaluation and Research, Division of Bacterial Products, Bethesda, Md.	1
Institute of Child Health, Division of Cell and Molecular Biology, London, England	1
Merck Research Laboratories, Developmental Human Vaccine Serology, West Point, Pa.	3
National Public Health Institute, Helsinki, Finland	3
National University Hospital, Department of Immunology, Reykjavik, Iceland	1
Pasteur Mérieux Connaught, Clinical Sero-Immunology Laboratory, Val de Reuil, France	1
Pasteur Mérieux Connaught, Clinical Serology Laboratory, Swiftwater, Pa.	1
Statens Serum Institut, Division of Microbiology, Copenhagen, Denmark	4
University of Minnesota, Department of Pediatrics, Minneapolis	3
University of Rochester, School of Medicine, Rochester, N.Y.	1
Wyeth-Lederle Vaccines and Pediatrics, West Henrietta, N.Y.	3