The Singapore General Hospital (SGH) is the public sector's flagship hospital. Established in 1821, the SGH is Singapore's oldest and largest acute tertiary hospital and national referral centre. Together with four specialty centres located within the SGH campus, patients have ready access to more than 30 clinical specialties. The specialty centres include the Singapore National Eye Centre (SNEC), National Heart Centre (NHC), National Cancer Centre (NDC) and National Dental Centre (NDC). SGH also serves as the national referral centre for Plastic Surgery and Burns, Renal Medicine, Nuclear Medicine, Pathology and Haematology. SGH is the world's second largest hospital to achieve JCI accreditation.