[1] Univ N Carolina, Genet, Chapel Hill, NC USA
[2] UCL Inst Ophthalmol, London, England
[3] Univ Texas Hlth Sci Ctr Houston, Ctr Human Genet, Houston, TX USA
[4] Univ Calif San Francisco, San Francisco, CA USA
[5] Univ San Diego, Shiley Eye Inst, San Diego, CA USA