1. The University of Sheffield Sheffield Children's Hospital Sheffield U.K
2. University of Lübeck Lübeck Germany
3. University of California San Diego Rady Children's Hospital San Diego CA U.S.A.
4. University of Manchester Royal Manchester Children's Hospital Manchester U.K
5. Sanofi Genzyme Cambridge MA U.S.A.
6. Regeneron Pharmaceuticals, Inc. Tarrytown NY U.S.A.
7. Regeneron Pharmaceuticals, Inc. Basking Ridge NJ U.S.A.
8. Sanofi Bridgewater NJ U.S.A.
9. Sanofi Chilly‐Mazarin France