[1] Med Univ Innsbruck, Dept Neurol, Innsbruck, Austria
[2] Med Univ Innsbruck, Dept Med Stat Informat & Hlth Econ, Innsbruck, Austria
[3] Univ Milan, IRCCS Fdn Ca Grande Osped Maggiore Policlin, Dino Ferrari Ctr, Neurosci Sect,Dept Pathophysiol & Transplantat, Milan, Italy
[4] Med Univ Innsbruck, Dept Neuroradiol, Innsbruck, Austria
[5] Med Univ Innsbruck, Dept Urol, Innsbruck, Austria
[6] Sapienza Univ Rome, Dept Heart & Great Vessels A Reale, Rome, Italy
[7] Santa Maria Hosp, Dept Neurol, Terni, Italy
[8] Sapienza Univ Rome, Dept Neurosci Mental Hlth & Sensory Organs, Rome, Italy
[9] NYU, Dept Neurol, Sch Med, Dysauton Ctr, New York, NY 10016 USA