1. Johnson & Johnson Worldwide Environment, Health, and Safety, New Brunswick, New Jersey, USA
2. Pfizer Inc., New York, New York, USA
3. Johnson & Johnson Pharmaceutical Research and Development, Raritan, New Jersey, USA
4. Wyeth, Madison, New Jersey
5. ARCADIS, Chelmsford, Massachusetts, USA
6. AMEC Earth & Environmental, Westford, Massachusetts, USA
7. Department of Geography and Environment, Boston University, Boston, Massachusetts, USA