depression
'I know it's not a big victory, but for me it means the world.'
The findings could help scientists find a drug which neutralises the side-effect.
Why fitness is key to feeling content
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Children from less privileged backgrounds may have 'lower expectation'.
A third of cases are not even assessed.
"There is nothing weak about struggling with mental illness."
'If you bottle up something for such a long time, it hurts.'
'This isn't a magic cure, but even so the effects at this stage do look promising.'
It's been a very difficult few months for the US singer.