1              Twenty ostensibly normal Norway brown rat eyes were fixed in 4% paraformaldehyde.

2                   Lesions were biopsied, and biopsy samples were fixed in 4% paraformaldehyde, and cryosectioned.

3                                     In the second, the eyes were fixed in 4% paraformaldehyde, and frozen sections were p

4 tached from the retinal pigment epithelium and 3 days later were fixed in 4% paraformaldehyde, embedded in 5% agarose, se

5 ic organs (brain, liver, kidneys, spleen, heart, and lungs) were fixed in 4% paraformaldehyde, embedded in paraffin, and