Wolters Kluwer Health is a leading provider of information for professionals and students in medicine, nursing, allied health, pharmacy and the pharmaceutical industry. Major brands include traditional publishers of medical and drug reference tools and textbooks, such as Lippincott Williams & Wilkins and Facts & Comparisons; electronic information providers, such as Ovid Technologies, Medi-Span and ProVation Medical; and pharmaceutical information providers Adis International and Source®. Wolters Kluwer Health is a division of Wolters Kluwer, a leading multi-national publisher and information services company with annual revenues (2005) of €3.4 billion and approximately 18,400 employees worldwide. Wolters Kluwer is headquartered in Amsterdam, the Netherlands. Its depositary receipts of shares are quoted on the Euronext Amsterdam (WKL) and are included in the AEX and Euronext 100 indices.