7Sinha IP;Smyth RL;Williamson PR. Using the Delphi technique to determine which outcomes to measure in clinical trials: recommendations for the future based on a systematic review of existing studies. PLoS medicine. [J], 2011,8(1):el 000393.
8Pecchia L;Bath PA;Pendleton N;Bracale M. Analytic Hierarchy Process (AHP) for Examining Healthcare Professionals" Assessments of Risk Factors. The Relative Importance of Risk Factors for Falls in Com- munity-dwelling Older People. Methods of information in medicine [J], 2011,50(1):1-10.