Evolutionary trajectory of undifferentiated connective tissue disease and impact of 2019 EULAR/ACR systemic lupus erythematosus classification criteria: insights from a longitudinal study.
Undifferentiated connective tissue disease (UCTD) is a condition characterized by serological evidence of autoimmunity and occurrence of clinical symptoms suggestive for systemic autoimmune diseases, yet not fulfilling specific classification/diagnostic criteria. In the present…