1. Centre for Research on Health and Social Care Management (CERGAS), SDA Bocconi School of Management, Bocconi University, Milan 20136, Italy
2. National Reference Training Center in Phlebology (NRTCP), Vascular Surgery – Cardiovascular Deptartment, Hesperia Hospital, Modena 41125, Italy
3. Department of Social and Political Sciences, Bocconi University, Milan 20136, Italy