J Neurol Neurosurg Psychiatry.
Wissel BD, Dwivedi AK, Merola A, Chin D, Jacob C, Duker AP, Vaughan JE, Lovera L, LaFaver K, Levy A, Lang AE, Morgante F, Nirenberg MJ, Stephen C, Sharma N, Romagnolo A, Lopiano L, Balint B, Yu XX, Bhatia KP, Espay AJ
doi: 10.1136/jnnp-2017-317378.