1. Harston, Cambridge, United Kingdom.
2. Woodbank, Loughboroughm, Leicestershire, United Kingdom.
3. Pfizer Cambridge Research Centre, Granta Park, Great Abington, Cambridge, United Kingdom.
4. Sheffield Children's Hospital, Western Bank, Sheffield, United Kingdom.
5. 3M Drug Delivery Systems, St. Paul, Minnesota.
6. Novartis Pharmaceutical Corp., San Carlos, California.