Text and Data Mining valid from 2019-12-17
Received: 6 March 2019
Accepted: 26 November 2019
First Online: 17 December 2019
Compliance with ethical standards
: The authors, their immediate families, and any research foundations with which they are affiliated did not receive any financial payments or other benefits from any commercial entity related to the subject of this article.
: Each author certifies that his or her institution approved the human protocol for this investigation and that all investigations were conducted in conformity with ethical principles of research.
: Informed consent was obtained from all individual participants included in the study.