1 Department of Neonatology A, Maternidade Dr Daniel de Matos, Centro Hospitalar e Universitario de Coimbra EPE, Coimbra, Portugal vaniamartins20@gmail.com.
2 Department of Neonatology A, Maternidade Dr Daniel de Matos, Centro Hospitalar e Universitario de Coimbra EPE, Coimbra, Portugal.