Is lymph node dissection mandatory among early stage endometrial cancer patients? A retrospective study oleh Guangmin Zhang, Hongyou Chen, Yanying Liu, Liyan Niu, Liming Jin, Dong Li, Lihua Song, Lifei Shang, Xiangya Lin, Fei Wang, Fengtong Li, Xinyu Zhang, Xiaoyu Zhang, Yan Gao, Dongyu Qiu, Yunpu Zhang, Ren Na, Riguge Su