Author contribution: Milushkina OYu, Popov VI, Skoblina NA — scientific guidance, writing an article; Markelova SV, Fedotov DM, Ievleva OV — collection of material, statistical processing, literature analysis.

Compliance with ethical standards: This study was approved by the LEK Pirogov Russian National Research Medical University (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.