Text and Data Mining valid from 2019-01-04
First Online: 4 January 2019
Compliance with Ethical Standards
: All participants were asked to read and sign an informed consent form prior to the start of the study. Standards, guidelines, and approval for the use of student cohorts relative to this research were administered by the RUSVM institutional review board (IRB).
: The authors declare that they have no conflict of interest.This manuscript does not contain images, tables or figures which are under copyright. All authors have read and accept responsibility for this manuscript.