University of Oviedo, Spain
University of Aarhus, Denmark
University of Manchester, UK
University of Groningen, Netherlands
Institute of Physics of the Czech Academy of Science, Czech Republic
University of Sevilla, Spain
University of Salamanca, Spain
Autonomous University of Madrid,Spain
Institute for Optoelectronic Systems and Microtechnology, Polytechnic University of Madrid, Spain
Materials Science Institute of Madrid-CSIC, Spain