Case T-375/10: Judgment of the General Court of 16 September 2013 — Hansa Metallwerke and Others v Commission (Competition — Agreements, decisions and concerted parties — Bathroom fittings and fixtures markets in Belgium, Germany, France, Italy, the Netherlands and Austria — Decision finding an infringement of Article 101 TFEU and Article 53 of the EEA Agreement — Coordination of price increases and exchange of sensitive business information — Cooperation during the administration procedure — 2002 Leniency Notice — Reduction of the fine — 2006 Guidelines on the method of setting fines — Non-retroactivity)