摘要
Xuanwei City and Fuyuan County of the Yunnan Province in south-west China are located in late Permian coal-accumulating areas.Both regions are rich in coal resources and have many coal mines.In the 1970s,epidemiologic studies demonstrated that lung cancer rates in Xuanwei were 4–5 times higher than the average in China[1,2].The characteristics of these lung cancer incidences in the populations of Xuanwei and Fuyuan were described in previous studies.First,more women in Xuanwei and Fuyuan suffered from lung cancer,in comparison to other areas.
基金
supported by National Basic Research Program of China(973 Program)(No.2011CB510104)
a grant from the Yunnan Province Science and Technology Department(No.Y103951111).
