Text and Data Mining valid from 2020-01-03
Received: 12 September 2019
Accepted: 16 December 2019
First Online: 3 January 2020
Compliance with ethical standards
: The authors have no conflict of interests to declare.
: This study was approved by the Institutional Review Board of the authors’ affiliated institutions (identification number: 1510).
: Informed consent was obtained from all patients.