Text and Data Mining valid from 2020-04-30
Received: 2 September 2019
First Online: 30 April 2020
Ethics approval and consent to participate
: The study protocol complied with the Helsinki Declaration and was approved by the Institutional Review Board. All individuals gave written consent for the procedures and inclusion in the study.
: Not applicable. Our study does not include any individual person’s data.
: The authors declare that they have no competing interests.