It entails a different approach to life, death, health and illness, and a different view of the doctor-patient relationship, of health services and of risk factors.

UNESCO: Social and Human Sciences

"There are likely to be many factors to do with our environment and our health that might increase our risk of developing cancer, " he said.

BBC: NEWS | Health | Pregnancy disorder link to cancer

Professor James said there was a wide spectrum of risk factors related to obesity, which when viewed as a whole, have a tremendous impact on health.

BBC: Obesity epidemic tops 1.7bn

These women tend to be better educated, more interested in health and from the higher socio-economic classes - all factors thought to reduce the risk of dementia.

BBC: Pills