1. Department of Neurology Mayo Clinic Rochester MN USA
2. Division of Rheumatology Local Health Unit Company‐Institute of Hospitalization and Scientific Care Reggio Emilia Italy
3. Division of Hematology Mayo Clinic Rochester MN USA
4. Division of Rheumatology Mayo Clinic Rochester MN USA
5. Department of Anatomic Pathology Mayo Clinic Rochester MN USA
6. Department of Radiology Mayo Clinic Rochester MN USA
7. Clinical Immunology, Allergy and Advanced Biotechnologies Unit USL‐IRCCS of Reggio Emilia Reggio Emilia Italy