1. IIAIGC Study Center, Burlington, VT, USA
2. INSERM, Centre de Recherches en Cancérologie de Toulouse, CRCT, Inserm/Université Toulouse III, Paul Sabatier, Hubert Curien, Toulouse, France
3. Department of Neurosurgery, Ulm University Hospital, Albert-Einstein-Allee, Ulm, Germany
4. Mutagenesis & Cancer Prevention Unit, IRCCS Azienda Ospedaliera Universitaria San Martino, IST Istituto Nazionale per la Ricerca sul Cancro, Largo Rosanna Benzi, Genoa, Italy
5. Department of Neurosurgery, University of Kansas, Lawrence, KS, USA