1. Bhatia KP, Bain P, Bajaj N et al. Consensus Statement on the classification of tremors. From the task force on tremor of the International Parkinson and Movement Disorder Society. Mov Disord 2018; 33(1): 75–87. doi: 10.1002/ mds.27121.
2. Singleton A, Farrer MJ, Bonifati V. The genetics of Parkinson’s disease: progress and therapeutic implications. Mov Disord 2013; 28: 14–23. doi: 10.1002/mds.25249.
3. Erro R, Scheider SA, Stamelou M et al. What do patients with scans without evidence of dopaminergic deficit (SWEDD) have? New evidence and continuing controversies. J Neurol Neurosurg Psychiatry 2016; 87(3): 319–323. doi: 10.1136/jnnp-2014-310256.
4. Van de Warrenburg BPC, Lammens M, Lucking B et al. Clinical and pathologic abnormalities in a family with parkinsonism and parkin gene mutations. Neurology 2001; 56(4): 555–557.