European Commission, Pharmaceutical Sector Inquiry, Preliminary Report (DG Competition Staff Working Paper), 28 November 2008, page 17 (pdf, 1.95 MB). (See copyright notice in page 1: "Reproduction of parts of this report that are based on the Commission's own research is authorised, provided that the source is acknowledged. For material quoted in this report that is derived from other sources, permission must be sought directly from the copyright holder.")