Text and Data Mining valid from 2018-11-21
Received: 8 March 2018
Revised: 11 October 2018
Accepted: 23 October 2018
First Online: 21 November 2018
Compliance with ethical standards
: The study was approved by the Ethics Committee of the hospital. The study was performed in compliance with The Code of Ethics of the World Medical Association (Declaration of Helsinki).
: The authors declare that they have no conflict of interest.