Name	Location	Role	Contribution
Antonio Giorgio, MD PhD	University of Siena	Author	Study concept and design, acquisition, analysis and interpretation of data, drafting manuscript
Ilaria Di Donato, MD	University of Siena	Author	Acquisition of data
Alessandro De Leucio, MD	University of Siena	Author	Analysis of data
Jian Zhang, MD	University of Siena	Author	Analysis of data
Emilia Salvadori, PhD	University of Florence	Author	Acquisition of data
Anna Poggesi, MD PhD	University of Florence	Author	Acquisition of data
Stefano Diciotti, PhD	University of Bologna	Author	Interpretation of data, critical revision of manuscript for intellectual content
Mirco Cosottini, MD PhD	University of Pisa	Author	Acquisition of data
Stefano Ciulli, PhD	University of Florence	Author	Acquisition of data
Domenico Inzitari, MD PhD	University of Florence	Author	Critical revision of manuscript for intellectual content
Leonardo Pantoni, MD PhD	University of Milano	Author	Critical revision of manuscript for intellectual content
Mario Mascalchi, MD PhD	University of Florence	Author	Critical revision of manuscript for intellectual content
Antonio Federico, MD PhD	University of Siena	Author	Critical revision of manuscript for intellectual content
Maria Teresa Dotti, MD PhD	University of Siena	Author	Study concept and design, critical revision of manuscript for intellectual content
Nicola De Stefano, MD PhD	University of Siena	Author	Study concept and design, interpretation of data, critical revision of manuscript for intellectual content