[1] Basildon & Thurrock Univ Hosp NHS Fdn Trust, Dept Obstet & Gynaecol, Basildon, England
[2] Basildon & Thurrock Univ Hosp NHS Fdn Trust, Basildon, England
[3] Feto Maternal Ctr, Doha, Qatar
[4] Weill Cornell Med, Obstet & Gynecol, Ar Rayyan, Qatar
[5] Univ Leicester, Dept Hlth Sci, Obstet & Gynaecol, Leicester, England