Screening studies for lung cancer have only been done in high risk populations in the U.S., such as smokers and workers with occupational exposure to certain substances. In the 2010s recommendations by medical authorities are turning in favour of lung cancer screening, which is likely to become more widely available in the advanced economies. Currently multiple professional organizations as well as the United States Preventive Services Task Force (USPSTF) and the Centers for Medicare and Medicaid Services (CMS) concur and endorse low-dose, computerized tomographic screening for individuals at high-risk of lung cancer.