JUPP Parkinson Selbsthilfegruppe – Grenchen is a self-help group in Grenchen, Switzerland, for people with Parkinson's disease. Language: German. Contact through Kontaktstelle Selbsthilfe Kanton Solothurn, 062 296 93 91, info@selbsthilfesolothurn.ch. Source: Selbsthilfe Schweiz, the national database of self-help groups.