Author contributions
Biancari and Mariscalco, had full access to all of the data in the study and take responsibility for the
integrity of the data and the accuracy of the data analysis.
Study concept and design: Biancari, Mariscalco, Dalen, De Keyzer, El-Dean, Fiore, Loforte, Spadaccio.
Acquisition of data: Alkhamees, Biancari, Bounaderm, Dalén, Dell’Aquila, Di Perna, El-Dean, Fiore, Gatti, Lichtenberg, Jónsson, Lechiancole, Loforte, Mariscalco, Perrotti, Pettinari, Pol, Ragnarsson, Ruggieri, Saeed, Spadaccio, Welp, Zipfel.
Analysis and interpretation of data: Biancari, Mariscalco, Maselli.
Drafting of the manuscript: Biancari, Mariscalco, El-Dean, Maselli.
Critical revision of the manuscript for important intellectual content: Alkhamees, Biancari, Dalén, Dell’Aquila, De Keyzer, Di Perna, Fiore, Gatti, Lichtenberg, Jónsson, Lechiancole, Loforte, Mariscalco, Maselli, Perrotti, Pettinari, Pol, Ragnarsson, Reichart, Ruggieri, Saeed, Settembre, Spadaccio, Welp, Zipfel.
Paper supervision: Biancari, Mariscalco, Juvonen.
Statistical analysis: Biancari, Mariscalco.
Language revision: El-Dean.