Concord Medical Services Holdings Ltd was incorporated in the Cayman Islands on November 27, 2007. On December 16, 2009, the Company completed its initial public offering. The Company operates its network of radiotherapy and diagnostic imaging centers in China. As of December 31, 2013, its network comprised 144 centers based in 81 hospitals, spanning 55 cities across 25 provinces and administrative regions in China. The centers in its network are established through long-term lease and management services arrangements entered into with its hospital partners. Each center is located on the premises of its hospital partners and is typically equipped with a unit of radiotherapy or diagnostic imaging equipment, such as a linear accelerator, head gamma knife system, body gamma knife system, positron emission tomography-computed tomography scanner, or PET-CT scanner, or magnetic resonance imaging scanner, or MRI scanner. It provides clinical support services to doctors who work in the centers in its network, which include developing treatment protocols for doctors and organizing joint diagnosis between doctors in its network and clinical research. In addition, the Company helps, recruit and determine the compensation of doctors and other medical personnel in its network and are typically in charge of the non-clinical aspects of the centers' daily operations, including marketing, training and administrative duties. The Company also create and distribute educational materials and brochures and engage in consumer advertising and educational campaigns through television, magazines and electronic media.