HP and anhaptoglobinemia: Security algorithms identified 16/1074 (1.5%) patients with high risk profiles of false positives/negatives: 11 with very low haptoglobin concentration (hemolysis or anhaptoglobinemia), 3 with suspected Gilbert's syndrome, and 2 with very low apolipoprotein A1 concentration, which could have a significant impact (0.30 or more) on the FT score.