Received: 5 December 2018
Accepted: 5 June 2019
First Online: 21 June 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions.
: Informed consent or substitute for it was obtained from all patients included in the study.
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