NavGeneral InfoEmail Print Original or alternative title SIXTY Geography Sweden (SWE) Stockholm Coverage type Subnational Time period covered 08/1997 - present Data type Survey Keywords Cerebrovascular diseases, Cohort study, Particulate matter, Trachea, bronchus, and lung cancers, Urban ambient air pollution Citation Contributors Karolinska Institute (Sweden) Funders Stockholm County Council Karolinska Institute (Sweden) Swedish Heart-Lung Foundation Swedish Council for Working Life and Social Research (FAS) Swedish Research Council AstraZeneca Pfizer Unilever Suggested citation Karolinska Institute. Sweden - Stockholm 60 years old and IMPROVE Study. GHDx Entry last modified on: Nov 6, 2018