1 Department of Breast and Thyroid Surgery, Provincial Hospital Affiliated to Shandong University, Jingwu Road 324, Huaiyin District, Jinan, 250021, Shandong, China.
2 Department of Breast and Thyroid Surgery, Provincial Hospital Affiliated to Shandong University, Jingwu Road 324, Huaiyin District, Jinan, 250021, Shandong, China. profzhaojian@163.com.