1. Biogen Inc., 225 Binney Street, Cambridge, Massachusetts 02142, United States
2. AstraZeneca, Macclesfield SK10 2NA, U.K.
3. GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K.
4. F. Hoffmann-La Roche Ltd., Grenzacherstrasse 124, 4070 Basel, Switzerland
5. Janssen pharmaceuticals, Turnhoutseweg 30, 2340 Beerse, Belgium