Major criteria | Chronic urticaria for more than 6 months |
---|---|
 | Hypocomplementemia |
Minor criteria | Leukocytoclastic vasculitis on skin biopsy |
 | Arthralgias or arthritis |
 | Ocular inflammation |
 | Glomerulonephritis |
Modified by | Abdominal pain |
Schwarz et al. [5] | Low C1q with positive anti-C1q antibodies |