- Nicolas Bergeal, Laboratoire de Physique et d’Étude des Matériaux, ESPCI, Paris, France;
- Stefan Kaiser, CFEL – Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany;
- Giorgio Sangiovanni, Institut fuer Theoretische Physik und Astrophysik, Wuerzburg, Germany, and
- Marco Schiro’, Columbia University, NY, USA & CNRS, IPhT-Saclay, France