A piece of a three-dimensional bone structure obtained from the own adipose stem cells of a patient is seen at Brussels' Saint Luc Hospital 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)