The scientists in Maastricht use muscle stem cells to develop a treatment for rare muscle diseases. The research into this treatment is led by Professor Bert Smeets of Maastricht University. Muscle stem cells needed for this research can be obtained from a muscle biopsy. Years ago this was a major operation, but technology has improved enormously. A piece of muscle from Sara’s father Bram, founder of the Voor Sara foundation, was also removed from the upper leg for the examination. He put it to the test.