Article History
Received: 20 September 2020
Accepted: 29 January 2021
First Online: 17 May 2021
Compliance with ethical standards
:
: Drs. Iuliia Alimova, Stanislav Chernyshov, Marat Nagudov and Evgeniy Rybakov have no conflicts of interest or financial ties to disclose.
: Ethics approval was not required for this systematic review and meta-analysis.
: Informed consent was not required for this systematic review and meta-analysis.