William Kaelin and Gregg Semenza of US, Britain's Peter Ratcliffe win Nobel Medicine Prize US researchers William Kaelin, Gregg Semenza and Britain's Peter Ratcliffe win the Nobel Medicine Prize for discoveries on how cells sense and adapt to oxygen availability, the Nobel Assembly said. "These fundamental findings have greatly increased our understanding of how the body adapts to change and applications of these findings are already beginning to effect the way medicine is practised," says Professor Randall Johnson, a member of the Nobel Assembly. IMAGES AND SOUNDBITES