Colonic biopsies to assess the neuropathology of Parkinson's disease and its relationship with symptoms. oleh Thibaud Lebouvier, Michel Neunlist, Stanislas Bruley des Varannes, Emmanuel Coron, Anne Drouard, Jean-Michel N'Guyen, Tanguy Chaumette, Maddalena Tasselli, Sébastien Paillusson, Mathurin Flamand, Jean-Paul Galmiche, Philippe Damier, Pascal Derkinderen