1. Bradford Royal Infirmary; Maternity Unit M1; Duckworth Lane Bradford UK BD6 9RJ
2. Bradford Institute for Health Research; Maternal and Child Health; Bradford Royal Infirmary Duckworth Lane Bradford UK BD9 6RJ
3. University of Nottingham; Nottingham Clinical Trials Unit; B39, Medical School Queen's Medical Centre Campus Nottingham UK NG7 2UH