1. Dipartimento di Biologia e Patologia Molecolare e Cellulare, BioGeM Consortium, Istituto di Endocrinologia ed Oncologia Sperimentale CNR, Università “Federico II,” 80131 Naples, Italy
2. Department of Molecular Biology, Max-Planck-Institut fur Biochemie, D-82152 Martinsried, Germany
3. Institute of Cancer Research, Columbia University, New York, New York 10032