1 Department of Pediatrics, Centro Hospitalar de Vila Nova de Gaia Espinho EPE Vila Nova de Gaia, Vila Nova de Gaia, Portugal. Electronic address: joana.pinho@chvng.min-saude.pt.
2 Department of Pediatrics, Centro Hospitalar de Vila Nova de Gaia Espinho EPE Vila Nova de Gaia, Vila Nova de Gaia, Portugal.