Correction to: J. Am. Soc. Mass Spectrom

https://doi.org/10.1007/s13361-019-02158-x

Near the end of fifth paragraph in the Introduction, an equation in the next to last sentence should read:

J = max[TPR + TNR], notJ = max [TPR + TPR}.

The complete sentence, corrected, should read:

The Youden index can be calculated relatively easily, J = max[TPR + TNR].