[1] Qingdao Univ, Dept Pharmacol, Qingdao, Shandong, Peoples R China
[2] Univ Iowa, Dept Ophthalmol & Visual Sci, Iowa City, IA USA
[3] Massachusetts Gen Hosp, Dept Anesthesia, Res Inst, Boston, MA 02114 USA
[4] Vet Affairs Med Ctr, Ctr Prevent & Treatment Visual Loss, Iowa City, IA 52242 USA