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Article History

Received: 27 April 2018

Accepted: 6 July 2018

First Online: 4 August 2018

Ethics approval and consent to participate

: Our study complies with the declaration of Helsinki and was approved by the locally appointed ethics committee (The ethics committee of Izmir Katip Celebi University).

: We did not use an informed consent form since this was a retrospective study.

: The authors declare that they have no competing interests.

: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.