1 Berman-Gund Laboratory for the Study of Retinal Degenerations, Harvard Medical School, Massachusetts Eye and Ear Infirmary, Boston, MA, USA.
2 Schepens Eye Research Institute, Harvard Medical School, Boston, MA, USA.
3 Department of Genetics, Institute of Ophthalmology, NIHR Biomedical Research Centre, University College London, London, UK.
4 Berman-Gund Laboratory for the Study of Retinal Degenerations, Harvard Medical School, Massachusetts Eye and Ear Infirmary, Boston, MA, USA. tli@meei.harvard.edu.