作者机构:[1]Department of Epidemiology and Biostatistics, Tianjin Medical University Cancer Hospital and Institute, Tianjin 300060, P. R. China, [2]Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University, Ministry of Education, Tianjin 300060, P. R. China
相关基金:Acknowledgements This study was jointly supported by grants from the National Natural Science Foundation of China to K.C. (No. 30872172) and the Tianjin Science and Technology Committee Foundation (No. 08ZCGH202000, 09ZCZDSF04400),
Corresponding Author:, Ke-Xin Chen, Department of Epidemiology and Biostatistics, Tianjin Medical University Cancer Hospital and Institute, Tianjin 300060, P. R. China. Tel: +86-22-23372231; Email: chenkexin 1963 @ yahoo .com.