1. Department of Physiology, University of Kentucky, Lexington, KY 40508, USA
2. The Center for Muscle Biology, University of Kentucky, Lexington, KY 40536, USA
3. College of Health Sciences, University of Kentucky, Lexington, KY 40536, USA
4. Division of Pediatric Neurology, Department of Women's and Children's Health, Karolinska Institutet, Stockholm 171 77, Sweden
5. Molecular Muscle Mass Regulation Laboratory, Exercise Science Research Center, Department of Health, Human Performance, and Recreation, University of Arkansas, Fayetteville, AR 72701, USA
6. Cell and Molecular Biology Program, University of Arkansas, Fayetteville, AR 72701, USA