Text and Data Mining valid from 2019-06-11
First Online: 11 June 2019
Compliance with Ethical Standards
: Informed consent was obtained from all individual participants included in the study. All procedures performed were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments. This study received approval from our Institutional Review Board.
: The authors declare that they have no conflict of interest.