Ellis, Buttow and Tattersall have published two studies conducted with breast cancer patients: the first in 2001 found that that women who have a better knowledge of clinical trials are more willing to consider participating in a clinical trial, however in 2002 patients who had received a booklet of information about research for patients were significantly less likely to consider participating in a randomised clinical trial (RCT). Using a very large sample (n=2331) Jenkins, Fallowfield and Saul showed that the vast majority of cancer patients questioned wanted a great deal of specific information concerning their illness and treatment.