[1] Univ Milan, Dept Biomed & Clin Sci Luigi Sacco, Milan, Italy
[2] Fdn IRCCS Policlin San Matteo, Clin Nutr & Dietet Unit, Pavia, Italy
[3] Univ Pavia, Dept Brain & Behav Sci, Pavia, Italy
[4] IRCCS Mondino Fdn, Clin Neurophysiol Unit, Pavia, Italy
[5] IRCCS Mondino Fdn, Neurorehabil Unit, Pavia, Italy
[6] Univ Pavia, Dept Publ Hlth Expt & Forens Med, Unit Biostat & Clin Epidmiol, Pavia, Italy
[7] Univ Genoa, IRCCS Osped Policlin San Martino, Dept Neurosci Rehabil Ophthalmol Genet & Maternal, Genoa, Italy
[8] Univ Padua, Dept Neurosci, Ctr Neurodegenerat Dis CENSE, Parkinson & Movement Disorders Unit, Padua, Italy
[9] Presidio Osped Sciacca AG, Azienda Sanitaria Prov Agrigento, UO Complessa Radiol Distretto Ag Sciacca Ribera 2, Sciacca, Agrigento, Italy
[10] Univ Pavia, IRCCS Policlin San Matteo Fdn, Dept Otolaryngol Head Neck Surg, Pavia, Italy
[11] Mayo Clin, Dept Neurol, Rochester, MN USA
[12] Univ Autonoma Barcelona, Hosp Mataro, Gastrointestinal Physiol Lab, Mataro, Spain
[13] Inst Salud Carlos III, Ctr Invest Biomed Red Enfermedades Hepat & Digest, Barcelona, Spain
[14] IRCCS, Ist Sci Neurol Bologna, Bologna, Italy
[15] Univ Bologna, DIBINEM, Bologna, Italy
[16] Fdn IRCCS Ist Neurol Carlo Besta, Milan, Italy
[17] Univ Manchester, Div Diabet Endocrinol & Gastroenterol, Salford Royal Hosp, Salford, Lancs, England
[18] Univ Canterbury, Rose Ctr Stroke Recovery & Res, Dept Commun Disorders, Christchurch, New Zealand
[19] Univ Torino, Dept Neurosci Rita Levi Montalcini, Turin, Italy
[20] Univ Padua, ENT Dept, Padua, Italy
[21] Univ Padua, Dept Neuroscie, Rehabil Unit, Padua, Italy
[22] Univ Patras, Sch Hlth Rehabil Sci, Dept Speech & Language Therapy, Patras, Greece
[23] IRCCS Mondino Fdn, Parkinsons Dis & Movement Disorders Unit, Pavia, Italy
[24] Oregon Hlth & Sci Univ, Dept Neurol, Portland, OR USA
[25] Garibaldi Hosp, Dept Neurol, Catania, Italy
[26] Univ Pavia, Dept Publ Hlth Expt & Forens Med, Unit Human & Clin Nutr, Pavia, Italy
[27] Sapienza Univ Rome, Dept Sense Organs, Rome, Italy
[28] UCL, Queen Sq Inst Neurol, Dept Clin & Movement Neurosci, London, England
[29] Univ & Inst Res Med Care IRCCS San Raffaele, Rome, Italy
[30] Univ Barcelona, Hosp Clin Barcelona,Parkinson Dis & Movement Diso, Inst Invest Biomed August Pi & Sunyer IDIBAPS,Neu, Ctr Invest Biomed Red Enfermedades Neurodegenerat, Barcelona, Spain
[31] Univ Verona, Hlth Aging Ctr, Dept Med, Div Geriatr, Verona, Italy
[32] Univ Catania, Dept GF Ingrassia, Catania, Italy
[33] IRCCS Mondino Fdn, Pavia, Italy