Elsevier is a world-leading provider of information solutions that enhance the performance of health profesionals, science and technology researchers, empowering them to make better decisions, deliver better care, and sometimes make groundbreaking discoveries that advance the boundaries of knowledge and human progress. Elsevier provides web-based, digital solutions — among them ScienceDirect, Scopus, Elsevier Research Intelligence and ClinicalKey — and publishes over 2,500 journals, including The Lancet and Cell, and more than 33,000 book titles, including a number of iconic reference works. Elsevier is part of RELX Group plc, a world-leading provider of information solutions for professional customers across industries. RELX Group is owned by two parent companies. Reed Elsevier PLC is the London Stock Exchange listed vehicle for holding shares in RELX Group. Reed Elsevier NV is the Amsterdam Stock Exchange listed vehicle for holding shares in RELX Group.