Author contribution: Ievleva OV – literature analysis, study design, data acquisition, statistical analysis, manuscript writing.

Compliance with ethical standards: the study was approved by the Ethics Committee of the Pirogov Russian National Research Medical University (protocol No. 203 dated December 20, 2020). The informed consent was obtained from all participants. Online survey was conducted on a voluntary basis using the online service. The study met the requirements of biomedical ethics and posed no risk to participants.