Aguirre, Gustavo D2023-05-232023-05-231980-12-012013-08-19https://repository.upenn.edu/handle/20.500.14332/48933Reproduced from Am J Pathol 1980, 101(3 Suppl): S187-S196 with permission from the American Society for Investigative Pathology (http://www.journals.elsevierhealth.com/periodicals/ajpa/home). The archived version of this article can also be found online at http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1903622/Medicine and Health SciencesOphthalmologyVeterinary MedicineArticle