Text and Data Mining valid from 2019-03-27
Received: 7 September 2018
Accepted: 18 March 2019
First Online: 27 March 2019
Compliance with ethical standards
: We state that there is none to declare.
: 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.