Fig. 3From: No need for a gold-standard test: on the mining of diagnostic test performance indices merely based on the distribution of the test valueProbability distribution of HBs Ag in the studied population (green curve), and the two Gaussian components derived from curve fitting procedure. The gray curve is the distribution of HBs Ag in disease-free population; the red curve, diseased population; and the yellow curve is the superposition of the two curves, the best fit to the probability distribution of HBs Ag (the green curve)Back to article page