This article has been retracted: please see Elsevier Policy on Article Withdrawal ( cliquez ici ).
This article has been retracted at the request of the Editor-in-Chief, with the approval of all authors. It appears that the study was carried out without the knowledge or authorisation of the senior staff of King’s College Hospital NHS Foundation Trust, in particular without endorsement of some co-authors.
In addition, it was submitted without prior knowledge or consent of the people in the Acknowledgements. The study not been authorized by the Institution.Le texte complet de cet article est disponible en PDF.