A study by Johansen et al. reported on genetic screening in 60 DBS-treated and 570 non-DBS PD patients consecutively enrolled in a movement disorder centre.19 All patients were screened for LRRK2 and SNCA mutations, whereas investigation of parkin, PINK1, GBA and other genes was performed depending on age at onset and family history. Here, PRKN is linked to Parkinson disease.