Case T-110/07: Judgment of the General Court of 3 March 2011 — Siemens v Commission (Competition — Agreements, decisions and concerted practices — Market in gas insulated switchgear projects — Decision finding an infringement of Article 81 EC and Article 53 of the EEA Agreement — Market sharing — Effects within the common market — Concept of continuous infringement — Duration of the infringement — Limitation period — Fines — Proportionality — Aggravating circumstances — Role of leader — Mitigating circumstances — Cooperation)