[1] UCSF, Neurol, San Francisco, CA USA
[2] Univ Basel, Univ Hosp Basel, Neurol, Basel, Switzerland
[3] UCSF, Opthalmol, San Francisco, CA USA
[4] Univ Calif San Francisco & Berkeley, Bioengn Grad Grp, San Francisco, CA USA
[5] Univ Calif San Francisco & Berkeley, Bioengn Grad Grp, Berkeley, CA USA
[6] UCSF, Radiol & Biomed Imaging, San Francisco, CA USA