Undoubtedly, timely, continuous and reliable information on levels and trends in mortality and causes of death in populations is essential for priority setting for health programs.This research represents the first documented comprehensive attempt to estimate the leading causes of death and YLLs for Iran. While the completeness of the death registration system operated by the Iranian MOH&ME appears to be acceptable in the majority of provinces, further efforts are needed to improve the quality of data on mortality in Iran. A significant proportion of deaths in the Iranian MOH&ME s Death...