Probability density of sensitivity or specificity of hormone receptors. Short-dash lines show density distribution of less informative priors (K1, sensitivity or specificity follows β distribution with a 95% credible interval [CI] between 0.70 and 0.95); dash lines show density distribution of informative prior (K2, sensitivity or specificity follows β distribution with a 95% CI between 0.85 and 0.95); blue solid lines show posterior density, given the less informative priors and the data; and red solid lines show posterior density, given the informative priors and the data. In the mathematic notations, p stands for probability, D stands for data, and K stands for prior knowledge.