Yan-Yan Fan, Jia Li, Yan Fu, Department of Obstetrics and Gynecology, the First Hospital of Jilin University, Changchun 130021, Jilin Province, China
Yi-Nan Liu, Department of Otorhinolaryngology, Jilin Province FAW General Hospital, Changchun 130011, Jilin Province, China
Author contributions: Fan YY, Liu YN, Li J, and Fu Y participated in the diagnosis and management of this case; Fan YY wrote the manuscript; Fu Y revised the manuscript; all authors read and approved the final manuscript.
Informed consent statement: All study participants, or their legal guardian, provided informed written consent prior to study enrollment.
Conflict-of-interest statement: The authors declare no conflict of interest.
CARE Checklist (2016) statement: The authors have read the CARE Checklist (2016), and the manuscript was prepared according to CARE checklist (2016).
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Corresponding author: Yan Fu, MD, Chief Doctor, Department of Obstetrics and Gynecology, the First Hospital of Jilin University, No. 71, Xinmin Street, Changchun 130021, Jilin Province, China. email@example.com
Telephone: +86-431-81875228 Fax: +86-431-81875228
Received: June 20, 2018
Peer-review started: June 20, 2018
First decision: July 8, 2018
Revised: February 6, 2019
Accepted: February 18, 2019
Article in press: February 18, 2019
Published online: March 6, 2019