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Dark grey squares: deficient ADAMTS13 activity with inhibitory or non-inhibitory anti-ADAMTS13 antibodies; light grey squares: deficient ADAMTS13 activity with suspected inhibitory or non-inhibitory anti-ADAMTS13 antibodies; white squares: detectable (≥20%) ADAMTS13 activity. Grey area delimits ADAMTS13 values of normal subjects. Abbreviation: TMA, thrombotic microangiopathy.
