1. Joint consensus conference on misconduct in biomedical research;Nimmo;Proc. R. Coll. Phys. Edinb.,2000
2. The Delphi method: techniques and applications;Linstone,1975
3. Clinical trials for tomorrow;M.R.C.,2003
4. Doing naturalistic inquiry. A guide to methods;Erlandson,1993
5. The Delphi techniques: its contribution to the evaluation of professional practice;Reid,1988