1. BCNatal – Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), Fetal i + D Fetal Medicine Research Center, IDIBAPS, University of Barcelona, Barcelona, Spain;
2. Biostatistics and Data Management Core Facility, IDIBAPS, Hospital Clinic, Barcelona, Spain;
3. Biostatistics Unit, Faculty of Medicine, Universitat Autónoma de Barcelona, Barcelona, Spain;
4. Microbiology, Biomedical Diagnostic Center, Hospital Clínic and ISGlobal (Barcelona Institute for Global Health), University of Barcelona, Barcelona, Spain;
5. Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona, Spain