Approved by: Frontiers Editorial Office, Frontiers Media SA, Switzerland
This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Following publication, concerns were raised regarding the provenance of the data used in this study. Specifically, during the investigation, which was conducted in accordance with Frontiers' policies, the authors failed to provide appropriate authorization for use of patient data.
Unauthorized data use is a breach of Frontiers' guidelines and those of the Committee on Publication Ethics. As such, this article is being retracted. The authors agree to this retraction.