The same holds true for other mental diseases like schizophrenia.

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Once the robot can do this the researchers plan to disrupt the memories in a bid to recreate the gradual loss of mental faculties seen in diseases such as Alzheimer's and Parkinson's.

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It has also introduced annual appraisals for doctors and new national service frameworks aimed at stamping out variations in the care given to children, the elderly, people with mental illness and those with serious diseases like cancer.

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But he notes that young adulthood brings many health risks and behaviors that can have lasting effects, from sexually transmitted diseases to eating disorders, substance abuse and mental-health issues.

WSJ: Young Adults Find It's Hard to Part With the Pediatrician

Crossbench peer and former NHS chief executive Lord Crisp, who called the debate, warned of a worldwide "epidemic" of non-communicable diseases, such as diabetes, cancer and mental health problems.

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That's because obesity leads to so many different diseases--diabetes, heart disease, arthritis, mental disease--that it's hard to separate out the reasons for the reduction in costs once the employee loses weight.

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However, unlike smoking, sedentary lifestyles lead to more than 40 medically recognised chronic diseases, such as coronary heart disease, type 2 diabetes, obesity, mental illness, dementia, some cancers.

BBC: Laziness will send us to an early grave