1. From the Departments of Clinical Science, Section of Ophthalmology and
2. Integrative Medical Biology, Section of Anatomy, University of Umea°, Umea°, Sweden; the3Centre of Musculoskeletal Research, University of Ga¨vle, Ga¨vle, Sweden; and the
3. Copenhagen Muscle Research Center, Department of Molecular Muscle Biology, Rigshospitalet, Copenhagen, Denmark.