Text and Data Mining valid from 2019-11-13
Received: 4 September 2019
Revised: 4 November 2019
Accepted: 5 November 2019
First Online: 13 November 2019
Compliance with ethical standard
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: The present study was performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. The local ethical committee boards provided exemption of approval for non-interventional studies. We obtained an informed consent from each participant prior to any study procedure. In no way, this study did interfere in the care received by patients.