Demenz Angehörige Gesprächsgruppe – Lyss is a group led by a professional in Lyss, Switzerland, for relatives of people with Alzheimer's disease. Language: German. Contact through Selbsthilfe BE - Beratungszentrum Biel / Info-Entraide BE - Centre de consultation Bienne, 0848 33 99 00, info@selbsthilfe-be.ch. Source: Selbsthilfe Schweiz, the national database of self-help groups.