The family of a US woman whose cells revolutionised medical research have been granted a say over how they are used, six decades after her death.
Henrietta Lacks, a poor black woman from Maryland, had cells removed from her by doctors when she was being treated for terminal cancer in 1951.
Researchers found they were the first human cells that could be grown indefinitely in a laboratory.
The historic breakthrough paved the way for countless medical treatments.
The story of how an African-American tobacco farmer unwittingly transformed biomedicine was made famous by a 2010 best-seller, The Immortal Life of Henrietta Lacks.