[1] Vrije Univ Amsterdam Med Ctr, Dept Mol Cell Biol & Immunol, NL-1007 MB Amsterdam, Netherlands
[2] Vrije Univ Amsterdam Med Ctr, Dept Pathol, NL-1007 MB Amsterdam, Netherlands
[3] Univ Tennessee, Ctr Hlth Sci, Dept Ophthalmol, Memphis, TN 38163 USA
[4] TNO Qual Life, Dept Biosci, Leiden, Netherlands