1. Istituto Zooprofilattico Sperimentale delle Venezie, viale dell'Universitá, 10, 35020 Legnaro, Italy
2. Department
of Biomedical Sciences, University of Padova, Via G. Colombo 3, 35131 Padova, Italy
3. Proteomics Center of Padova University, Via G. Orus 2, 35129 Padova, Italy
4. Department
of Immunotechnology, Lund University, Medicon Village, S-223 81 Lund, Sweden