1 Erratum to: Patient DOI 10.1007/s40271-015-0131-2

The following changes have been made to the text.

Final sentence of Sect. 3.1 should read as follows:

In addition to test criterion validity, respondents were asked to score 13 items that are contained in the Patient Activation Measure® (PAM®) [16].

The original article has been updated accordingly.