Author contributions: Ievleva OV — literature analysis, study design, data collection, statistical processing, writing an article.

Compliance with ethical standards: the study was a pproved by the Local Ethics Committee of Pirogov Russian National Research Medical University (Protocol No. 203 dated December 20, 2020). Voluntary informed consent was obtained from every participant. Online interview was carried out on a voluntary basis using online services. The study corresponded to ethical guidelines for biomedical research and did not expose the participants to any danger.