- Accord/HMO
- Alteon
- Amgen, Inc.
- Anapharm, Inc.
- Aventis
- Biomedical Systems
- Chiron
- Ciba Specialty Chemicals, Inc.
- Clinical Device Group, Inc.
- Clinical Science and Development
- College of American Pathologists
- Concentra, Inc.
- Cook County Bureau of Health Services
- Covance, Inc.
- Clinical Trial Services (CTS)
- Discus Dental, Incorporated
- DuKane Corporation
- EMD Chemicals, Inc.
- GE Healthcare
- Genentech, Inc.
- GlaxoSmithKline
- Global Med-Net, Inc.
- Health Care Alliance Group, Inc.
- Health Quest
- Hu-Friedy Manufacturing Company, Inc.
- Huntingdon Life Sciences
- Illinois Department of Public Health
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