Text and Data Mining valid from 2019-11-07
Received: 17 May 2019
Accepted: 25 October 2019
First Online: 7 November 2019
Compliance with ethical standards
: All authors declare no conflicts of interest.
: All procedures followed have been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments.
: Informed consent was obtained from all patients for being included in the study.