1. Molecular Medicine Section, Department of Neuroscience, University of Siena, Siena, Italy.
2. Center for Stem Cells Research, University of Siena, Siena, Italy.
3. Department of Surgical Oncology, Policlinico “Santa Maria alle Scotte,” Siena, Italy.
4. Department of Hematology, Policlinico “Santa Maria alle Scotte,” Siena, Italy.
5. Department of Cardiosurgery, Policlinico “Santa Maria alle Scotte,” Siena, Italy.