1. Laboratory of Bacterial Polysaccharides, Division of Bacterial, Parasitic and Allergenic Products, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland 20993, United States
2. Genovis Inc., Cambridge, Massachusetts 02142, United States
3. Facility for Biotechnology Resources, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland 20993, United States
4. Genovis AB, Box 790, SE-220 07 Lund, Sweden