Issues in the classification of myositis patients: an ongoing process

Affiliations

• ¹ Department of Internal Medicine and Therapeutics, Università di Pavia, and Division of Rheumatology, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy. gio.zanframundo@gmail.com.
• ² Systemic Autoimmune Diseases Unit, Internal Medicine Department, Vall d'Hebron General Hospital, Universitat Autonoma de Barcelona, Spain.
• ³ Medicine and Psychiatry Department, University of Cantabria, Santander, and Division of Rheumatology, IIS-Fundacion Jiménez Díaz, Madrid, Spain.
• ⁴ Department of Internal Medicine and Therapeutics, Università di Pavia, and Division of Rheumatology, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.