1. Cardiovascular Research Center, Massachusetts General Hospital, Charles River Plaza/CPZN 3200, 185 Cambridge Street, Boston, MA 02114-2790, USA.
2. Harvard Medical School, 250 Longwood Avenue, Boston, MA 02115, USA.
3. Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands.
4. Genea/FSHD, 321 Kent Street, Sydney NSW 2000, Australia.
5. Harvard Stem Cell Institute, 1350 Massachusetts Avenue, Cambridge, MA 02138, USA.