Materials and Methods
This systematic review based on Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A wide search of databases including ISI Web of science, PubMed, Scopus and EmBase was performed from January 2015 to September 2019 Which were published in English.20 A preliminary search of all of the mentioned sites revealed 290 studies and in our study, two studies from Google Scholar were added by expert opinion. Full details of the search strategy are provided in Supplement 1. Only studies in English were included.