Text and Data Mining valid from 2019-07-01
Received: 4 December 2018
Revised: 11 January 2019
Accepted: 7 February 2019
First Online: 28 August 2019
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflict of interests</i>. The authors declare that they have no conflict of interest.
: <i>Statement of compliance with standards of research involving humans as subjects</i>. Informed consent was obtained from all individual participants involved in the study. All procedures were performed in accordance with the order of the RF Ministry of Health of August 11, 2017, no. 517n, and according to the recommendations of the WMA Helsinki Declaration (Declaration of Helsinki: Ethical Principles for Medical Research Involving Human Subjects, including amendments made by the 64th Meeting of WMA in Fortaleza, Brazil, October 2013).