[1] Tufts Univ, Ctr Translat Ocular Immunol, Tufts Med Ctr,Sch Med, Dept Ophthalmol, Boston, MA USA
[2] Tufts Univ, New England Eye Ctr, Tufts Med Sch,Cornea Serv, Dept Ophthalmol,Sch Med, Boston, MA USA
[3] Univ Penn, Scheie Eye Inst, Dept Ophthalmol, Philadelphia, PA USA
[4] Scripps Green Hosp, Dept Cornea, La Jolla, CA USA
[5] Scripps Green Hosp, Dept External Dis, La Jolla, CA USA
[6] Univ Penn, Perelman Sch Med, Philadelphia, PA USA
[7] Tufts Med Ctr, 800 Washington St, Boston, MA 02111 USA