has characteristic has characteristic has_onset_before Juvenile onset 20-year-old stage juvenile-onset Parkinson disease https://www.malacards.org/card/juvenile_onset_parkinsons_disease MEDGEN:155699 Editor notes: check onset axioms DOID:0060893 UMLS:C0752105 GARD:0022833 juvenile-onset Parkinson's disease MONDO:0000828 Parkinson disease young-onset Parkinson disease