Funding:
This study was supported by grants from Instituto de Salud Carlos III 208 (ISCIII) COV20/00188 and iMaterna Foundation (Fundación para la Investigación y el Desarrollo de la Medicina Materno-Fetal y Neonatal, Registry No: 2148). Perkin Elmer provided the reagents for laboratory testing and Synlab Diagnósticos Globales provided the instruments and human resources to perform the analyses of the samples. The funders had no role in study conception and execution, data collection, analyses of the results, nor in the writing of the manuscript or decision to submit for publication.