What controls are most valid for managing D-dimer assay precision?

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VTE decision point control only; 500 ng/mL FEUs
13% (4 votes)
Low end of linearity & VTE decision point: 100 and 500 ng/mL FEUs
31% (10 votes)
Low and high ends of linearity & VTE decision point: 100, 500 & 2000 ng/mL FEUs
19% (6 votes)
VTE decision point & high end of linearity: 500 & 2000 ng/mL FEUs
25% (8 votes)
Low and high ends of linearity: 100 & 2000 ng/mL FEUs
13% (4 votes)
Other--please comment
0% (0 votes)
Total votes: 32