Belgian Professor Denis Dufrane, coordinator of the centre of tissue and cellular therapy of Brussels' Saint Luc Hospital talks to Reuters, in Belgium January 14, 2014. Belgian medical researchers have succeeded in repairing bones using stem cells from fatty tissue, with a new technique they believe could become a benchmark for treating a range of bone disorders. Picture taken January 14, 2014. REUTERS/Yves Herman (BELGIUM - Tags: HEALTH SCIENCE TECHNOLOGY BUSINESS)