1. Division of Maternal and Foetal Medicine, University Hospital La Paz, Madrid, Spain,
2. Department of Clinical Chemistry, University Hospital La Paz, Madrid, Spain,
3. CEMBIO (Centre for Metabolomics and Bioanalysis), Universidad San Pablo CEU University, Pharmacy Faculty, Madrid, Spain, and
4. Department of Pharmacology, Medical University of Bialystok, Bialystok, Poland