UK Biobank achieves 500,000 target
The most comprehensive health study in the UK has reached its goal of enrolling 500,000 adults.
UK Biobank volunteers have undergone medical checks, answered health and lifestyle questions and given genetic samples, to be stored for decades.
Scientists hope it will help them to understand more about a host of conditions, from dementia, to heart disease, and cancer.
The BBC's Fergus Walsh reports.