Whelan, A. M., T. M. Jurgens, and L. Lord. 2009. "Evaluating the quality of randomized controlled trials that examine the efficacy of natural health products: a systematic review of critical appraisal instruments." Evidence-based complementary and alternative medicine : eCAM 6(4): 441-448.
The purpose of this project was to conduct a systematic review to identify instruments designed to evaluate the quality of randomized controlled trials (RCTs) of natural health products (NHPs). Instruments were examined ...