1. Drug Substance Technologies, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
2. Lhasa Limited, Leeds, West Yorkshire, U.K., LS11 5PS
3. Vertex Pharmaceuticals, Inc., 50 Northern Avenue, Boston, Massachusetts 01757, United States
4. Process Research and Development, AbbVie Inc., 1 North Waukegan Road, North Chicago, Illinois 60064, United States