1. Department of Neonatology, Hospital Sant Joan de Déu, University of Barcelona; Barcelona Spain
2. Imprinting and Cancer Group; Cancer Epigenetic and Biology Program; Bellvitge Biomedical Research Institute; Hospital Duran & Reynals; Barcelona Spain
3. Genetics; Reproduction and Development laboratories (GreD); CNRS; UMR6247; Clermont Université; INSERM U931 Clermont-Ferrand France
4. Laboratory of Molecular Genètics, Hospital Sant Joan de Déu, University of Barcelona; Barcelona Spain
5. Department of Pathology, Hospital Sant Joan de Déu, University of Barcelona; Barcelona Spain
6. Genetics and Genomic Medicine Programme; Institute of Child Health, University College London; London, UK
7. Department of Surgery; Hospital Sant Joan de Déu; University of Barcelona; Barcelona Spain
8. Section of Neonatology; Department of Pediatrics; Hospital Sant Pau; Barcelona Spain