1. Division of Microbiology, Department of Pathology and Laboratory Medicine, Hartford Hospital, Hartford, Connecticut 06102-50371;
2. Department of Laboratory Medicine, Children’s Hospital, Columbus, Ohio 432052;
3. Department of Laboratory Medicine, St. Christopher’s Hospital for Children, Philadelphia, Pennsylvania 191343;
4. Department of Pathology, St. Luke’s Episcopal Hospital, Houston, Texas 77225-02694;
5. Department of Pathology, Northwestern Memorial Hospital, Chicago, Illinois 606115; and
6. Department of Pathology and Laboratory Medicine, Evanston Hospital, Evanston, Illinois 60201-17836