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Table 1 Allocation of observed combinations of Harvester and ELISA operator.

From: Quality assessment of an interferon-gamma release assay for tuberculosis infection in a resource-limited setting

Sample Specimen* Harvest ELISA Data Sample Specimen Harvest ELISA Data
1 1 A A Observed 7 4 A A Observed
2 1 A B Observed   4 A B Not observed
  1 B A Not observed 8 4 B A Observed
  1 B B Not observed   4 B B Not observed
  2 A A Not observed   5 A A Not observed
  2 A B Not observed 9 5 A B Observed
3 2 B A Observed   5 B A Not observed
4 2 B B Observed 10 5 B B Observed
5 3 A A Observed   6 A A Not observed
  3 A B Not observed 11 6 A B Observed
  3 B A Not observed 12 6 B A Observed
6 3 B B Observed   6 B B Not observed
  1. *To each specimen, two measurements were assigned. This layout was repeated twice by using different sets of specimens in each trial.