1. Centro Rosarino de Estudios Perinatales (CREP); Moreno 878, 6th floor Rosario Santa Fe Argentina S2000DKR
2. Nottingham Health Science Partners; Nottingham Clinical Trials Unit; C Floor, South Block Queen's Medical Centre Nottingham UK NG7 2UH
3. University of Stellenbosch; Obstetrics & Gynaecology; Department of Obstetrics & Gynaecology PO Box 19063 Tygerberg Stellenbosch South Africa 7505
4. Centro Rosarino de Estudios Perinatales (CREP); Department of Obstetrics, Hospital Provincial de Rosario; Moreno 878, 6th floor Rosario Argentina S2000DKR