OC12.07: Cord blood cardiovascular biomarkers in left‐sided congenital heart disease. Issue Volume 58:Issue S1(2021)Supplement (14th October 2021) - Soveral, I.; Antolin, E.; Llurba, E.; Alcaide, M.; Bartha, J.L.; Martínez, J.; Escobar, M.; Gratacos, E.; Crispi, F.; Gómez, O.