1 Division of Ophthalmology, Alpert Medical School, Brown University, Coro Center West, Suite 200, 1 Hoppin Street, Providence, RI, USA.
2 Section of Ophthalmology, Providence VA Medical Center, Providence, RI, USA.
3 Watson Institute for International and Public Affairs, Brown University, Providence, RI, USA.
4 Division of Ophthalmology, Alpert Medical School, Brown University, Coro Center West, Suite 200, 1 Hoppin Street, Providence, RI, USA. paul_greenberg@brown.edu.
5 Section of Ophthalmology, Providence VA Medical Center, Providence, RI, USA. paul_greenberg@brown.edu.