Care Angharad, Pavord Sue, Knight Marian, Alfirevic Zarko
Centre for Women and Children's Health Research, University of Liverpool, Liverpool Women's Hospital, Liverpool, UK.
Oxford University Hospitals, Headington, Oxford, UK.
BJOG. 2018 Apr;125(5):630. doi: 10.1111/1471-0528.14857. Epub 2017 Sep 22.