Text and Data Mining valid from 2018-10-02
Received: 18 May 2018
Accepted: 21 August 2018
First Online: 2 October 2018
Ethics approval and consent to participate
: The study was conducted in accordance with the ethical standards of the Local Institutional Review Board and with the 1964 Helsinki declaration and its later amendments. This project was approved by the Local Bioethics Committee. All patients gave their written informed consent before the study.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.