After publication of this work , we noted that two of the authors were incorrectly named. The author list for this article should read Thomas W Hoffmann, Gilles Duverlie and Abderrahmane Bengrine.
All authors declare that they have no competing interests.
TWH read the articles and gathered information cited in this review. GD revised the manuscript. TWH and AB drafted the manuscript. All authors read and approved the final manuscript.