Please leave your comments for the authors below Thank you very much for allowing me to review this nice article. This article has the merit to be published in this journal. However, I have some comments that might be helpful to improve the quality of the paper if addressed properly. 1. The introduction section is too long to follow. It seems the last two paraphs are not that relevant. Perhaps you could improve it by considering the following aspects (give details about the problem statement, purpose, contribution to the literature, and how does it help in policymaking). 2. Please clearly mention the date of the study. 3. Methods (search strategy): In this section, I see the authors have used PubMed, Scopus, and other bibliographic databases. I suggest including the web of science database. 4. It would be great if you please provide a flow diagram of potential data processing following the PRISMA flow guideline. 5. Please write a few words on conflicting results. 6. Give details about publication bias

Please leave your comments for the authors below The authors have addressed my previous comments. This paper looks great and would be a great addition to the literature in the respective field.