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  Indian J Med Microbiol
 

Figure 3: Twenty item time calibration test (n =154), time per item recorded and wpi known. Time versus wpi, r2 = 0.95, mean time = 42 s and mean WPI = 60.1.

Figure 3: Twenty item time calibration test (n =154), time per item recorded and wpi known. Time versus wpi, r<sup>2</sup> = 0.95, mean time = 42 s and mean WPI = 60.1.