1. Ke Ma, Xi Yang, Rui Chen, et al. Liquid-based endometrial cytology associated with curettage in the investigation of endometrial carcinoma in postmenopausal women. Taiwanese J Obstet Gynecol. 2016;55(6):777-781.
2. Xi Yang, Ke Ma, Rui Chen, et al. *Liquid-based endometrial cytology associated with curettage in the investigation of endometrial carcinoma in a population of 1987 women.* Arch Gynecol Obstet. 2017;296:99-105. (Co-first author)
3. Xi Yang, Ke Ma. Successful single-port laparoscopic management of abdominal pregnancy in the Douglas pouch. Clin Exp Obstet Gynecol. 2017;5:792-794. (Corresponding author)
4. Xi Yang, Ke Ma, Yiting Meng. Parasitic teratoma in the pouch of Douglas. Clin Exp Obstet Gynecol. 2018;6:952-956. (Corresponding author)
5. Ma K, Feng ZY, Zhu LR, Wen HW. Misdiagnosis of pelvic tuberculosis as ovarian cancer: 11 case analyses. Chin J Clin Obstet Gynecol. 2012;13(1):33-35.
6. Ma K, Liu TY, Huang WP, Wen HW, Liao QP. *Efficacy analysis of surgery and postoperative chemotherapy for 68 cases of stage IB–IIA cervical cancer with intermediate-high recurrence risk factors.* J Pract Obstet Gynecol. 2012;28(11):33-37.
7. Ma K, Yang YH, Yang X, et al. Postoperative adjuvant chemotherapy versus concurrent chemoradiotherapy for stage IB2–IIB cervical cancer. J Peking Univ (Health Sci). 2013;45(6):910-915.
8. Ma K, Yang YH, Yang X, Zhang XW. Pregnancy outcomes of different delivery methods for active-phase arrest. Chin J Clin Obstet Gynecol. 2014;15(1):33-36.
9. Ma K, Yang X, Zhang Y, Yin L, Liao QP. Single-port vs. multi-port laparoscopic surgery for benign ovarian tumors. Chin J Clin Obstet Gynecol. 2015;16(3):221-224.
10. Ma K, Yang X, Yin L, Liao QP. Single-incision vs. multi-port laparoscopy for tubal pregnancy. Chin J Minim Invasive Surg. 2015;15(12):1057-1060.