immune system disease
   |__primary immunodeficiency disease
       |__complement deficiency  3 rec.
           |__atypical hemolytic-uremic syndrome
           |__C1 inhibitor deficiency
           |__complement component 2 deficiency
           |__complement component 3 deficiency 3 rec.
           |__complement component 4a deficiency 3 rec.
           |__complement component 4b deficiency 3 rec.
           |__complement component 5 deficiency 3 rec.
           |__complement component 6 deficiency
           |__complement component 7 deficiency
           |__complement component 9 deficiency
           |__complement factor I deficiency
           |__type I complement component 8 deficiency
           |__type II complement component 8 deficiency
           |__X-linked properdin deficiency