Tools for Distribution-Based ROC Smoothing Using 'pROC' // Extends the functionality of the 'pROC' package for conducting smoothed receiver operating characteristic (ROC) curve analysis. Enables automated selection of the distribution families to be fit when smoothing ROC curves via the population probability density function estimation strategy described by Leeflang et al. (2008) doi:10.1373/clinchem.2007.096032, as well as generation of diagnostic performance and cutoff estimates from the resultant smoothed curves.