About the Authors

Li-Yuan Liu

Affiliations Epidemiology Institute, School of Public Health, Shandong University, Jinan, Shandong, China, Department of Breast Diseases, the Second Hospital of Shandong University, Jinan, Shandong, China

Meng Wang

Affiliation Epidemiology Institute, School of Public Health, Shandong University, Jinan, Shandong, China

Zhong-Bing Ma

Affiliation Department of Breast Diseases, the Second Hospital of Shandong University, Jinan, Shandong, China

Li-Xiang Yu

Affiliation Department of Breast Diseases, the Second Hospital of Shandong University, Jinan, Shandong, China

Qiang Zhang

Affiliation Department of Breast Diseases, the Second Hospital of Shandong University, Jinan, Shandong, China

De-Zong Gao

Affiliation Department of Breast Diseases, the Second Hospital of Shandong University, Jinan, Shandong, China

Fei Wang

Affiliation Department of Breast Diseases, the Second Hospital of Shandong University, Jinan, Shandong, China

Zhi-Gang Yu

yzg@medmail.com.cn

Affiliation Department of Breast Diseases, the Second Hospital of Shandong University, Jinan, Shandong, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LYL ZBM. Performed the experiments: LYL LXY. Analyzed the data: LYL MW. Contributed reagents/materials/analysis tools: LYL. Wrote the manuscript: LYL. Copyedited the manuscript: QZ DZG FW. Gave much advice and directions in both study design and preparing of the manuscript: ZGY.