Text and Data Mining valid from 2018-08-01
Received: 8 July 2017
Accepted: 31 July 2018
First Online: 6 August 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed in this study were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki Declaration and its later amendments.
: Informed consent was obtained from all patients.