1. European Organization for Nuclear Research (CERN), Geneva, Switzerland
2. Georgia Institute of Technology, USA
3. Abingdon, UK
4. Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany
5. CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Gif-sur-Yvette, France
6. Braunschweig, Germany
7. Japan Atomic Energy Agency (JAEA), Japan
8. Ente per le Nuove Tecnologie, L’Energia e L’Ambiente (ENEA), Bologna, Italy
9. Istituto Nazionale di Fisica Nucleare (INFN), Frascati, Italy