Absence of plasma melatonin circadian rhythm during the first 72 hours of life in human infants

1. Muñoz-Hoyos, A.
2. Jaldo-Alba, A.
3. Molina-Carballo, A.
4. Rodriguez-Cabezas, T.
5. Molina-Font, J.A.
6. Acuña-Castroviejo, D.