Johnson & Johnson is engaged in the research and development, manufacture and sale of a range of products in the healthcare field. Johnson & Johnson has more than 250 operating companies. The Company operates in three segments. The Consumer segment includes a range of products used in the baby care, skin care, oral care, wound care and women’s healthcare fields, as well as nutritional and over-the-counter pharmaceutical products. The Pharmaceutical segment includes products in the therapeutic areas, such as anti-infective, antipsychotic, cardiovascular, contraceptive, dermatology, gastrointestinal, hematology, immunology, neurology, oncology, pain management, urology and virology. The Medical Devices and Diagnostics segment includes a range of products distributed to wholesalers, hospitals and retailers. In July 2009, Johnson & Johnson completed the acquisition of Cougar Biotechnology, Inc. with approximately 95.9% interest in Cougar Biotechnology's outstanding common stock.