This review was conducted according to the guidelines outlined in Preferred Reporting Items for Systematic Reviews and Meta-Analyses: The (PRISMA) Statement [30].Information Sources and Search Strategy
The Medline bibliographic database of the National Library of Medicine, accessed through the National Institutes of Health's PubMed online resource, was searched for articles to include in this review.Eligibility Criteria
Manuscripts considered eligible for this review included only: i. original published articles, and ii. observational or experimental studies.We found 27 papers that met these criteria.3.1.3.2.