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Provincial cervical cancer age-standardized morality rates (ASMR) of mainland China during four periods, excluding Taiwan, Hong Kong and Macau, China. (A) 1973–1975, the First National Survey of Death Causes; (B) 1990–1992, the Second National Sampling Survey of Death Causes; (C) 2004–2005, the Third National Survey of Death Causes; (D) 2011–2013, the 625 qualified cancer registries.
