COMMISSION DECISION of 10 December 2003 relating to a proceeding under Article 81 of the EC Treaty and Article 53 of the EEA Agreement (Case COMP/E-2/37.857 — Organic peroxides) (notified under document number C(2003) 4570 final and corrigendum C(2004) 4) (Only the English, German and Spanish texts are authentic) (2005/349/EC)