But the British study found no evidence for that belief.
The new British study will include 15,000 women at high risk of breast cancer.
Already a British study of 120,000 women found the method was 85 percent accurate.
British studies with a different focus have shown similar persistent levels.
In a 2005 British study, around 35% of medical students reported having been bullied.
Evidence in its favour is limited to one small British study.
The policy implications of the many relevant British and foreign studies are also being drawn out.
They're the subject of a unique British study into their habits and lifestyle.
A British study showed that 78% of fractures occur during training.
British studies is the academic study of Britain - its culture, geography and history.