This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/policies/article-withdrawal).
This article has been retracted at the request of the authors. After publication, the authors contacted the journal regarding errors and omissions affecting Sections 2.1 (Subjects) and 3.1 (Sample characteristics and response to L-DOPA) of the article. Given the errors identified, the authors cannot have full confidence in the article’s conclusions. After careful consideration, the authors have requested retraction and the Editor-in-Chief has agreed.
The authors offer their apologies to readers, Editors and reviewers of this paper.
Footnotes
DOI of original article: https://doi.org/10.1016/j.jad.2020.01.066.