aDivision of Rheumatology, Department of Medicine, University of Padua, Padua

bDepartment of Medical Surgical and Health Sciences, University of Trieste, Cattinara Teaching Hospital, Trieste

cDivision of Emergency Medicine

dDivision of Thrombotic and Hemorrhagic Diseases, Department of Medicine, University of Padua, Padua

eUnit of Rheumatology, Department of Clinical and Biological Sciences, University of Turin, Turin, Italy

Correspondence to Professor Mariele Gatto, Rheumatology Unit, Department of Clinic and Biologic Sciences, University of Torino – via Verdi 8, Mauriziano Hospital – via Turati 2, Turin, Italy. E-mail: [email protected]