The &to=http:// english.pravda.ru/main/2002/07/02/31526_.html ' target=_blank>National Institutes of Health(NIH) researched 11,935 cancer patients between 1991 and 2002 who did not respond to &to=http:// english.pravda.ru/main/2002/06/13/30288.html ' target=_blank>traditional cancer treatment, finding that 11 per cent of those who submitted to experimental treatment saw significant improvement in their condition, with 34 per cent showing some improvement. Other similar studies only showed positive results with four to six per cent of patients who underwent experimental treatments, the researchers said. The NIH analysed 460 clinical tests conducted on 11,935 patients, but excluded those with children carried out by other pharmaceutical laboratories, tells the Courier Mail. People with advanced cancers who try experimental treatments are helped more than previously thought, according to the most comprehensive look at government-sponsored tests over a decade. These are patients who haven't benefited from other therapies and have few options left. But testing new treatments on them has been criticized by some who feel the patients are given false hope since previous reviews showed they only worked in about 4 percent to 6 percent.