Author contribution: Markelova SV, Fedotov DM — article writing; Khromova AV, Ievleva OV — collection of material, statistical processing, analysis of literature

Compliance with ethical standards: this study was approved by the LEK Russian National Research Medical University named after V.I. N.I. Pirogov (Protocol № 203 dated 20.12.2020). Voluntary informed consent was obtained for each participant. The online survey for the adult population was conducted on a voluntary basis using an online service. The conducted research does not endanger the participants and complies with the requirements of biomedical ethics.