Product Search Search Effective Health Care website Submit search Search Tip: Use double quotes around phrases to rank exact matches higher in the result list. 3 results Vitamin D and Calcium: A Systematic Review of Health Outcomes (Update) Executive Summary Archived September 15, 2014 Fifth Journal Supplement on Research Methods: Patient-Centered Health Outcomes in Rare Diseases Executive Summary July 24, 2014 Closing the Quality Gap: Revisiting the State of the Science — Series Overview Series Overview Archived June 23, 2011