1. Consultant Obstetrician & Gynaecologist Department of Obstetrics & Gynaecology Aberdeen Maternity Hospital & Aberdeen Royal Infirmary Aberdeen AB25 2ZL UK
2. Professor of Obstetrics & Gynaecology Unit of Obstetric Medicine, Department of Obstetrics & Gynaecology Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER) Puducherry 605 006 India
3. Doctoral Candidate Department of Epidemiology and Biostatistics, School of Public Health University at Albany, State University of New York Rensselaer NY 12144 USA
4. Consultant Obstetrician & Subspecialist in Maternal & Fetal Medicine Department of Obstetrics & Gynaecology Aberdeen Maternity Hospital Aberdeen AB25 2ZL UK
5. Honorary Senior Lecturer Aberdeen University Medical School Aberdeen UK
6. Consultant Respiratory Physician Department of Respiratory Medicine Aberdeen Royal Infirmary Aberdeen AB25 2ZN UK