1. Department of Medicine, University of Cambridge, Cambridge Institute for Medical Research, Cambridge, UK
2. Department Anatomy and Structural Biology, Albert Einstein College of Medicine of Yeshiva University, Bronx, NY
3. Dipartimento di Biologia e Biotecnologie “Charles Darwin” e Istituto Pasteur–Fondazione Cenci Bolognetti, Università di Roma “La Sapienza,” Rome, Italy