Funding for this research was provided by:
Instituto Português de Oncologia de Francisco Gentil, Lisboa, EPE
Received: 17 November 2017
Accepted: 21 November 2018
First Online: 17 December 2018
: The authors declare that they have no competing interest.
: The ethical committee of the Portuguese Cancer Institute in Lisbon approved the here in reported (committee’s reference number: UIC/971). Study design and conduction of the study were performed accordingly to high standards of ethics. Written informed consent was obtained prior to any data acquisition, sample collection, or data analysis from the parent or guardian in the case of children under 16.
: Not applicable.
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