Retraction notice to ‘Highly antibacterial polypeptide-based amphiphilic copolymers as multifunctional non-viral vectors for enhanced intracellular siRNA delivery and anti-infection’ (Acta Biomaterialia (2017) 58 (90–101), (S1742706117303641), (10.1016/j.actbio.2017.06.010))

This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted at the request of the Authors. The manuscript contains in vivo animal experiment (antiinfection study). The corresponding author checked all raw data again and found that the approval from the Animal Ethics Committee at Xi'an Jiaotong University was not received prior to performing the animal experiment, although it was stated as such in the paper. The authors apologize for the oversight. Given the situation, the authors do not have the confidence in the normalization of the animal experiments process and corresponding results. To maintain the academic standards and rigor, the authors request the retraction of this paper. All authors agree with this retraction except for Peter X. Ma where no response could be solicited in time.