2 METHODS
The review involved two stages: the first stage involved search in database, while the second stage included checking all the related studies found from the first stage to guarantee precision and constancy of the study. The guideline of “The Preferred Reporting Items for Systematic Review and Meta‐Analysis protocols (PRISMA)” was applied5 (See Supplementary File .1). This systematic review was registered in the PROSPERO under the number (CRD42021223297).