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Authors
Legnani, Claudio
Boisio, Francesca
Borgo, Enrico
Ventura, Alberto
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Article History
First Online: 9 July 2019
Compliance with ethical guidelines
:
: C. Legnani, F. Boisio, E. Borgo and A. Ventura declare that they have no competing interests.
: Informed consent was obtained from all individual participants included in the study. This retrospective study was performed in accordance with national legal requirements. All studies performed were in conformity with the ethical standards indicated in each case.
