The Parkinson disease pain classification system: results from an international mechanism-based classification approach.

Mylius V, Perez Lloret S, Cury RG, Teixeira MJ, Barbosa VR, Barbosa ER, Moreira LI, Listik C, Fernandes AM, de Lacerda Veiga D, Barbour J, Hollenstein N, Oechsner M, Walch J, Brugger F, Hägele-Link S, Beer S, Rizos A, Chaudhuri KR, Bouhassira D, Lefaucheur JP, Timmermann L, Gonzenbach R, Kägi G, Möller JC, Ciampi de Andrade D.