Author contribution: all authors contributed equally to study design, literature review, data collection, analysis, and interpretation.

Compliance with ethical standards: the study was approved by the ethics review board of the Federal State Autonomous Educational Institution of Higher Education Pirogov Russian National Research Medical University of the Ministry of Health of Russia (protocol # 211 of 18 October 2021) and carried out in accordance with the requirements of the Fundamentals of Legislation "On the protection of the health of citizens"; All participants signed a voluntary informed consent for the examination.