The healthcare sector comprises establishments providing healthcare services. This includes companies that manufacture healthcare equipment and supplies, and provide healthcarerelated services, including distributors of products and providers (owners and operators) of healthcare facilities and organizations. Also included in this sector are the companies involved in the research, development, production and marketing of pharmaceuticals and biotechnology products. Providers of diagnostic, preventive, remedial and therapeutic services such as doctors, nurses, hospitals and other private, public and voluntary organizations are listed under this sector, as are health insurance firms. The services provided by establishments in this sector are delivered by trained professionals with the requisite expertise.