[1
]
Hospital Pediátrico David Bernardino, Luanda, Angola Children's Hospital, Helsinki
University Central Hospital, and University of Helsinki, Helsinki, Finland tuulapelkonen@hotmail.com
tuula.i.pelkonen@hus.fi.
[2
]
Hospital Pediátrico David Bernardino, Luanda, Angola.
[3
]
Universidad Diego Portales, Facultad de Medicina, Santiago, Chile.
[4
]
Children's Hospital, Helsinki University Central Hospital, and University of Helsinki,
Helsinki, Finland.