[1] Pius Hosp Oldenburg, Dept Radiotherapy, Oldenburg, Germany
[2] Huazhong Univ Sci & Technol, Union Hosp, Tongji Med Coll, Dept Obstet & Gynecol, Wuhan, Peoples R China
[3] Univ Clin Schleswig Holstein, Dept Radiotherapy, Kiel, Germany
[4] Huazhong Univ Sci & Technol, Union Hosp, Tongji Med Coll, Dept Pathol, Wuhan, Peoples R China