[1] Boston Univ, Med Ctr, Dept Med, Physiol & Biophys & Diabet Unit, Boston, MA USA
[2] Univ Copenhagen, Copenhagen Muscle Res Ctr, Copenhagen, Denmark
[3] Whitehead Inst Biomed Res, Boston, MA USA
[4] MIT, Boston, MA USA
[5] Univ Texas, SW Med Ctr, Dallas, TX USA
[6] Vet Affairs Med Ctr, Dallas, TX USA