STAT!Ref is a collection of informational resources within TDS Health and has researching help available here
The following webpages provide a detailed look into advanced search strategies in evidence-based literature searching.
Finding Evidence in Health Sciences Research
National Information Center on Health Services Research and Health Care Technology (NICHSR)
National Institutes of Health National Medical Library
PubMed Clinical Queries Filter
Clinical Studies
Search Strategy for Systematic Reviews
Systematic Reviews