Text and Data Mining valid from 2018-12-01
Received: 29 June 2018
Accepted: 27 November 2018
First Online: 7 December 2018
: Eyup Avci takes responsibility for all aspects of the reliability and freedom from bias of the data presented and their discussed interpretation.
: The study was designed retrospectively. Balikesir University Ethics Committee waivered the need for informed consent regarding the retrospective data and approved this study.
: Not applicable.
: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.