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Table 1 Activity of the three complement pathways in the three patients and their parents

From: Invasive meningococcal disease in three siblings with hereditary deficiency of the 8th component of complement: evidence for the importance of an early diagnosis

  Classical pathway Alternative pathway Lectin pathway
% % %
Patient 1 0 0 0
Patient 2 3 0 0
Patient 3 3 0 0
Mother 116 92 120
Father 122 91 125
Normal range 69–129 30–113 0–125