Retraction Retraction dated 2020-05-15

Article History

Received: 14 March 2019

Accepted: 30 July 2019

First Online: 26 August 2019

Change Date: 15 May 2020

Change Type: Correction

Change Details: The Publisher has retracted this article [1]. Owing to an administrative error it was published without the amendments made by the authors at the proof stage. A second version of the article with the authors' amendments that should remain in the literature is [2]. The Publisher apologises to the authors and to readers for this error. All authors agree with this retraction.

Competing interests

: The authors declare that there is no conflict of interests regarding the publication of this paper.