The key database to use for finding the clinical evidence. Don't forget to use limits to narrow your results or use the related citations link from an article that closely answers your question.
Search for several EBM-themed resources (Therapy, Diagnosis, Etiology, etc.), Systematic Reviews, or Medical Genetics resources.
Start you search on the PubMed with meta-analysis already set as a publication type or keyword. Simply add the term(s) you want to find.
Use pre-configured search boxes to find very pertinent resources in PubMed.