Text and Data Mining valid from 2019-03-14
Received: 26 September 2018
Accepted: 6 March 2019
First Online: 14 March 2019
Compliance with ethical standards
: Approval of the local ethics committee was obtained and the study was conducted in agreement with the latest version of the Code of Ethics of the World Medical Association (Declaration of Helsinki).
: The authors declare that they have no conflicts of interest.