This case concerned a concentration involving two generic producers. The Commission of the European Communities approved the proposed acquisition of Barr Pharmaceuticals, Inc., by Teva Pharmaceutical Industries Limited, subject to conditions. In its decision, the Commission recognized that the third level of the anatomical therapeutic chemical (ATC) classification system, known by the abbreviation ATC3, is not always the most appropriate level for the purposes of market definition. It adopted inter alia a narrower market definition, i.e. the molecule level, for the competitive analysis of oncology products.