Erratum
After publication of this article [1], it was noticed the affiliation for Chiara M. Mazzanti was incorrectly included as “Department of Pathology, University of Pisa, Pisa, Italy.” The correct affiliation for Chiara M. Mazzanti is “Fondazione Pisana per la Scienza, Pisa, Italy” and has been included in this erratum in the author list and author details section.
Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.