Text and Data Mining valid from 2019-10-16
Received: 13 May 2019
Accepted: 6 September 2019
First Online: 16 October 2019
Ethics approval and consent to participate
: In accordance with national guidelines ethics approval and consent was not required since this was a secondary analysis of anonymous (de-identified) hospital data.
: Not applicable. The manuscript does not contain any personal identifiable material, photographs or videos.
: MN is an Associate Editor of BMC Pregnancy & Childbirth and sits on the editorial board. There are no other competing interests.