1. Rheumatology Department, Centro Hospitalar Universitário Lisboa Norte, Centro Académico de Medicina de Lisboa, and Rheumatology Research Unit, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Centro Académico de Medicina de Lisboa, Portugal.
2. Department of Internal Medicine and Therapeutics, Università di Pavia, and Division of Rheumatology, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.
3. Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Pisa, and Department of Medical Biotechnologies, University of Siena, Italy.
4. Department of Medicine, Surgery and Neurosciences, Rheumatology Unit, University of Siena, Italy.
5. Department of Neurology and Pain Treatment, Immanuel Klinik Rüdersdorf, University Hospital of the Brandenburg Medical School Theodor Fontane, Rüdersdorf bei Berlin, and Department of Neurology, Neuromuscular Centre, University Medical Centre Göttingen, Germany.
6. Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Pisa, and Internal Medicine, Livorno Hospital, Livorno, Italy. simone.barsotti.pisa@gmail.com