. Author manuscript; available in PMC: 2019 Apr 26.
Published in final edited form as: Int J Gynaecol Obstet. 2015 May 7;130(Suppl 3):E31–E36. doi: 10.1016/j.ijgo.2015.05.001
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).