[1] Univ Oklahoma, Hlth Sci Ctr, Dept Ophthalmol, Oklahoma City, OK 73104 USA
[2] Univ Oklahoma, Hlth Sci Ctr, Dept Physiol, Oklahoma City, OK 73104 USA
[3] Univ Oklahoma, Hlth Sci Ctr, Dept Cell Biol, Oklahoma City, OK 73104 USA
[4] Dean A McGee Eye Inst, Oklahoma City, OK 73104 USA