In addition to usual CME sources, you will want to search the primary literature as you investigate your question. There are a number of resources available for this purpose.
Searching the Literature, a module for the Online Research Methods Course formerly offered through the Departments of Family Practice and Paediatrics at UBC.
Systematic Reviews and Meta-analysis: An Introduction, presentation by Janusz Kaczorowski.
PubMed Tutorial (essential).
RefWorks, citation management software free for UBC students and faculty.
Family Practice Research Guide at the UBC Library