Text and Data Mining valid from 2019-06-14
Received: 25 January 2019
Accepted: 4 June 2019
First Online: 14 June 2019
Ethics approval and consent to participate
: Approval for the study was given by the local Research and Ethics Committee of each of the participating institution. Subjects’ participation in this study was voluntary. Verbally granted informed consent was obtained from each patient prior to enrollment into the study.
: Not applicable.
: The authors declare that they have no competing interests.