[1] Univ Alcala, Med Dept, Madrid, Spain
[2] Hosp Univ Ramon & Cajal, Neurol Dept, Movement Disorders Unit, IRYCIS, Madrid, Spain
[3] Hosp Ruber Int, Neurol Dept, Funct Movement Disorders Unit, Madrid, Spain
[4] Vithas Hosp Grp, Inst Neurosci, Dept Neurol, Madrid, Spain
[5] CIBERNED, Madrid, Spain
[6] Univ Seville, Hosp Univ Virgen Rocio, Neurol & Neurophysiol Dept, Movement Disorders Unit,Inst Biomed Sevilla,CSIC, Seville, Spain
[7] Hosp Univ Fdn Jimenez Diaz, Neurol Dept, Funct Disorders Unit, Madrid, Spain
[8] Hosp Univ Donostia, Dept Neurol, Inst Invest Sanitaria Biodonostia, San Sebastian, Spain
[9] Univ Autonoma Barcelona UAB, Hosp St Pau, Neurol Dept, Movement Disorders Unit, Barcelona, Spain
[10] St Pau Inst Biomed Res IIB St Pau, Barcelona, Spain
[11] Hosp Univ Ramon & Cajal, Internal Med Dept, Madrid, Spain