1. Department of Obstetrics and Gynecology, Division of Fetal Therapy and Surgery Baylor College of Medicine and Texas Children's Fetal Center Houston TX USA
2. Department of Obstetrics, Gynecology and Reproductive Sciences, Division of Maternal–Fetal Medicine University of Maryland School of Medicine Baltimore MD USA
3. Division of Clinical Geriatrics, Department of Neurobiology Care Sciences and Society, Karolinska Institutet Stockholm Sweden
4. Department of Medical Epidemiology and Biostatistics Karolinska Institutet Stockholm Sweden