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Article History

Received: 4 May 2018

Accepted: 22 October 2018

First Online: 6 November 2018

Ethics approval and consent to participate

: Data were treated according to the Italian Data Protection legislation (D.Lgs.n.196/2003). The Reggio Emilia cancer registry received approval from the Provincial Ethical Committee on July 23, 2014 (Comitato Etico Provinciale of Reggio Emilia, now Comitato Etico AVEN, after being merged with the other Ethics Committees of the Modena, Piacenza and Parma provinces ExternalRef removed). The study was sponsored and conducted by the Cancer Registry Directorate (LM and PGR) and the aims of this research are among those envisaged by the ethical committee.This is a retrospective observational study based on cancer registry data. In accordance with the Italian privacy law, no patient or parental consent is required for large retrospective population-based studies approved by the competent Ethics Committee if data are published only in aggregated form.

: Not applicable.

: The authors declare that they have no competing interests.

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