- Abbott Laboratories
- Antigen Laboratories
- Bayer
- BBCI
- Ben Venue Laboratories
- Boehringer Ingelheim
- Cambrex BioSciences
- Cambrex Charles City
- Celliance - Formerly Serologicals Corporation
- Centocor
- Culligan
- Diatos
- EaglePicher
- Elan Pharmaceuticals
- Eli Lilly
- EntraCare Nexius
- GlaxoSmithKline
- Hach Ultra Analytics
- Hollis-Eden Pharmaceuticals
- Ivy Animal Health
- JRH Biosciences
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KV Pharmaceuticals
- Legacy Packaging
- Martec Pharmaceutical
- MedImmune
- Meridian Medical Technologies
- Midland Pharmaceuticals
- Monsanto
- National Institute of Health - SAIC
- NorthStar Pharmaceutical
- Pfizer - multiple sites
- Protein Design Labs
- Quintiles
- Sanofi Aventis
- Sigma-Aldrich
- Unimark Plastics
- University of Iowa
- USDA
- Vision Pharma Technologies
- Watson
- Wyeth Ayerst
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