Heterogeneity/granularity in ethnicity classifications project:: the need for refining assessment of health status

Funding for the study was provided through funds from the Robert Wood Johnson Foundation and CAF America as part of the project Heterogeneity/Granularity in Ethnicity Classifications outside the United States: HGEC project (RB0408 CAF RWJF). This research was supported by the Usher institute of population health science and informatics, The University of Edinburgh.