Correction to: npj Parkinson's Disease (2017); doi:10.1038/s41531-016-0003-z; Published online 09 January 2017

Table 1 Baseline demographics of participants
Table 3 Change in mean scores on the MMAS-8 between PTA and TAU groups at 16 weeks (intention-to-treat population)

In the original version of this article the copyright notice was missing from Tables 1 and 3. This has now been added alongside the three relevant references inserted as refs. 21–23. The correction has been published and is appended to both the HTML and PDF versions of this paper. The errors have been fixed in the paper.

New references inserted:

Participants in the PTA group (n = 68) showed an improvement in MMAS-8.21,22,23

21. Morisky, D. E., Ang, A., Krousel-Wood, M., Ward, H. Predictive validity of a medication adherence measure for hypertension control. J. Clin. Hypertens. 10, 348–354 (2008).

22. Krousel-Wood, M. A. et al. New medication adherence scale versus pharmacy fill rates in seniors with hypertension. Am. J. Manag. Care 15, 59–66 (2009).

23. Morisky, D. E., DiMatteo, M. R. Improving the measurement of self-reported medication nonadherence: final response. J Clin Epidemio 64, 258–263 (2011). PMID:21144706.