Received: 20 January 2020
Revised: 27 February 2020
Accepted: 6 March 2020
First Online: 29 March 2020
Compliance with ethical standards
: The scientific guarantor of this publication is Prof. Rita Golfieri.
: The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.
: One of the authors has significant statistical expertise. Prof. Alessandro Cucchetti kindly provided statistical advice for this manuscript.
: Written informed consent was obtained from all subjects (patients) in this study.
: The present study fulfils the Regulation (EU) 2016/679 of the European Parliament and of the Council of 27 April 2016 on the protection of natural persons with regard to the processing of personal data (GDP regulation).OrderedList removed
: • Retrospective• Observational• Multicentre study