In this paper which appeared in Parkinson’s Disease (2012, Article ID 512892), the reference citation numbers appearing by the authors’ names in the left-hand side column did not match the correct references shown and cited. The reference numbers should appear as follows: for Sinforiani et al., the reference number has been changed from [24] to [25], Mohlman et al., the reference number has been changed from [25] to [26], Sammer et al., the reference number has been changed from [26] to [27], París et al., the reference number has been changed from [27] to [28].

Table 1 
Cognitive training programs for patients with Parkinson’s disease (revised).