1. Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Louvain-la-Neuve, Belgium
2. Instituto de Física, Pontificia Universidad Católica de Chile, Santiago, Chile
3. Institutul National de Cercetare-Dezvoltare pentru Tehnologii Izotopice şi Moleculare Cluj-Napoca, Cluj-Napoca, Romania