TDA(H) – Bienne is a self-help group in Bienne, Switzerland, for people with ADHD. Language: French. 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.