1. Department of Biotechnology and Bioscience, University of Milano-Bicocca, 20126 Milan, Italy
2. Immunology and Virology Program, Centre for Ophthalmology and Visual Sciences, The University of Western Australia and Centre for Experimental Immunology, Lions Eye Institute, Perth 6009, Western Australia, Australia
3. Laboratory of Virology, Istituto Superiore di Sanità, 00100 Rome, Italy