1. Instituto de Astrofısica de Canarias, Via Láctea s/n, La Laguna, Spain
2. Departamento de Astrofısica, Universidad de La Laguna (ULL), La Laguna, Spain
3. Consejo Superior de Investigaciones Científicas, Madrid, Spain
4. Center for Nanotechnology Innovation, NEST Italian Institute of Technology, Piazza San Silvestro 12, Pisa, Italy
5. CNIT, Consorzio Nazionale Interuniversitario per le Telecomunicazioni, Via G. Moruzzi 1 – località San Cataldo, Pisa, Italy
6. Actinium Chemical Research Institute, Via Casilina 1626A, Rome, Italy