1. Laboratory of Molecular Neuroembryology, IRCCS Fondazione Santa Lucia; Rome Italy
2. Department of Biology, Dulbecco Telethon Institute, University of Rome ‘Tor Vergata’; Rome Italy
3. Department of Cell Physiology and Metabolism, University of Geneva Medical School; Geneva Switzerland
4. Confocal Microscopy Unit, CNR-S.Lucia Foundation; Rome Italy
5. National Institute for Infectious Diseases IRCCS ‘L.Spallanzani’; Rome Italy
6. Department of Biology, University of Rome ‘Tor Vergata’; Rome Italy
7. Howard Hughes Medical Institute and UT Southwestern Medical Center at Dallas; Dallas TX USA