Key points are not available for this paper at this time.
The OASI Project was retrospectively registered on the ISCTRN12143325 database date assigned 03/10/2017.
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Posy Bidwell
South Warwickshire NHS Foundation Trust
Ranee Thakar
Royal College of Obstetricians and Gynaecologists
Nick Sevdalis
Cardiac Surgery
SHILAP Revista de lepidopterología
BMC Pregnancy and Childbirth
King's College London
London School of Hygiene & Tropical Medicine
Royal College of Obstetricians and Gynaecologists
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Bidwell et al. (Mon,) studied this question.
synapsesocial.com/papers/69d96aa7c7f0c3ae80a3d69d — DOI: https://doi.org/10.1186/s12884-018-1965-0