Clinical Research Directory

Inclusion Criteria: Patients: * Adult subjects \> or = 18 years of age * Subjects capable of providing informed consent * Active IgG4-RD based on the IgG4-related disease activity index * Fulfillment of the 2019 ACR/EULAR Classification Criteria for IgG4RD Healthy Controls: * Adult subjects \> or = 18 years of age * Subjects capable of providing informed consent Exclusion Criteria: Patients and healthy controls: * Subjects \< 18 years of age * Pregnant women * Comorbidities (other ongoing active autoimmune diseases, ongoing cancer, ongoing infections) * Ongoing immunosuppressive therapy