**About the Editor**

**Eugen Feist** studied medicine at the Institute of Medicine, Kiev, Ukraine, and the Charite,´ Humboldt-University of Berlin, Germany, from 1989 to 1995. He became a Consultant in Internal Medicine at the Department of Internal Medicine and Rheumatology at the Charite-Universit ´ atsmedizin in 2003. Two years later he became a Rheumatologist and in 2021 ¨ an Immunologist. Professor Feist's clinical work and research activities are focused on systemic autoimmune and autoinflammatory diseases, with special interests in rheumatoid arthritis and adult onset Still's disease. He has been awarded the MSD grant for Arthritis and the Wolfgang Schulze prize of the Deutsche Rheuma-Liga. In 2009, he received a postdoctoral lecture qualification for his work on the topic of proteasomes and autoimmunity. Since 2019, Professor Feist is medical director of the Helios Clinic for Rheumatology in Vogelsang-Gommern, a leading center in Saxony-Anhalt. He has acted as Investigator in numerous phase I to IV clinical studies in the field of rheumatology.
