Retraction Note to: European Journal of Clinical Pharmacology (2018) 75:131–132 https://doi.org/10.1007/s00228-018-2551-0

The Editor has retracted this article. After publication, it was brought to the attention of the Editor that Fig. 1 of this article is identical to Fig. 1 of a previously published article [1] from the same author group. Figure 1 is the central content of the two articles.

Renato De Vecchis, Carmelina Ariano, Angelos Rigopoulos, and Michel Noutsias have not responded to any correspondence from the publisher about this retraction.