Declarations. Conflict of interest: M. Yeşilyurt and G. Polat declare that they have no competing interests. Ethical standards: For this article no studies with human participants or animals were performed by any of the authors. All studies performed were in accordance with the ethical standards indicated in each case. The local ethics committee approval was obtained. Additional written informed consent was obtained from the patient or the legal representatives for whom identifying information is included in this article. This study has not been published or submitted elsewhere.