Melatonin concentration in the umbilical artery and vein in human preterm and term neonates and neonates with acute fetal distress

1. Muñoz‐Hoyos, A.
2. Rodriguez‐Cabezas, T.
3. Molina‐Carballo, A.
4. Martinez‐Sempere, J.J.
5. Ruiz‐Cosano, C.
6. Acuña‐Castroviejo, D.