Descending volcanic ash not a health hazard.
Chiropractic Association ends libel case against Simon Singh.
Training required to counter obesity prejudice.
Doctors call for trans-fat ban.
Abortions could take place in GP surgeries.
Journal berates government response to mephedrone.
New breakthrough offers hope of early Parkinson's detection.
MMR bowel disorder link re-examined.
New report questions dementia "death sentence" stigma.
Friends will be friends - the guide to a happy retirement.