Text and Data Mining valid from 2019-02-02
Received: 29 October 2018
Accepted: 24 January 2019
First Online: 2 February 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standard of the institutional and/or national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standard.
: Informed consent was obtained from all patients enrolled for this prospective study.