A regional health authority ( or RHF) is a state enterprise responsible for specialist healthcare in one of four regions of Norway. Responsibilities of the RHFs include patient treatment, education of medical staff, research and training of patients and relatives. Areas covered by the authorities are hospitals, psychiatry, ambulance service, operation of pharmacies at the hospitals, emergency telephone number and laboratories. The actual performance is done by subsidiary health trusts (HF) that usually consist of one or more hospitals, with associate responsibilities. The authorities are subordinate to the Norwegian Ministry of Health and Care Services.