1028-9933 1028-9933 S1028-99332020000500410 Cuba 00 10 2020 00 10 2020 99 5 410 411 1 World Health Organization 2020 2 2020 3 2020 395 10226 10226 809-15 4 Sociedad Española de Neonatología 2020 5 2020 44