Spanish expert consensus on the use of safinamide in Parkinson's disease F. Valldeoriola; F. Grandas; J.M. Arbelo; M. Blázquez Estrada; M. Calopa Garriga; V.M. Campos-Arillo; P.J. Garcia Ruiz; J.C. Gómez Esteban; C. Leiva Santana; J.C. Martínez Castrillo; P. Mir; A. Salvador Aliaga; F. Vivancos Matellano; R.M. Yáñez Baña;