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. 2 results Sort search results by Sorted by relevance Sort by date Fifth Journal Supplement on Research Methods: Patient-Centered Health Outcomes in Rare Diseases Executive Summary July 24, 2014 Change Score or Followup Score? An Empirical Evaluation of the Impact of Choice of Mean Difference Estimates White Paper April 20, 2015
