Text and Data Mining valid from 2019-07-01
Received: 23 February 2019
Accepted: 7 March 2019
First Online: 25 July 2019
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board of the Academic Medical Center (approval W17_353 #17.411). The need for written informed consent was waived seen the observational nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.
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