1. Neotropix, Inc., 351 Phoenixville Pike, Malvern, PA 19355, USA
2. Institute for Animal Health, Pirbright Laboratory, Ash Road, Pirbright, Woking GU24 0NF, UK
3. Human Genome Sciences, 9920 Belward Campus Dr., Rockville, MD 20850, USA
4. MedImmune, Inc., One MedImmune Way, Gaithersburg, MD 20878, USA