1. Sangart Inc., 11189 Sorrento Valley Rd., Ste. 104, San Diego, CA 92121, U.S.A.
2. Department of Biochemical Sciences, University of Rome ‘La Sapienza’, Piazzale Aldo Moro 5, 00185 Rome, Italy
3. Institute of Molecular Biology and Pathology, CNR, Rome, Italy
4. Department of Medicine, Surgery and Dentistry, Ospedale San Paolo, University of Milan, Via di Rudini 8, 20142 Milan, Italy
5. Department of Bioengineering, Bioengineering Building, University of California, San Diego, La Jolla, CA 92093, U.S.A.