1. Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
2. Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
3. Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
4. Department of Cell Biology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
5. Department of Metabolism and Aging, The Scripps Research Institute, Jupiter, Florida, USA
6. Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
7. McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
8. Department of Physical Therapy, University of Pittsburgh, Pittsburgh, Pennsylvania, USA