letter 2016 Prevalence of Endometriosis During Abdominal or Laparoscopic Hysterectomy for Chronic Pelvic Pain Obstetrics and gynecology ·doi:10.1097/aog.0000000000001604 Xia, Wei Ting MD; Cai, Yao Yao MD; Yang, Si Meng MD; Wu, Xue Qing MD; Quinn, Martin J. MD, LLM Author Information