25. Schmidt SY, Peisch RD: Melanin concentration in normal human retinal pigment epithelium. Regional variation and age-related reduction. Investigative Ophthalmology & Visual Science 1986;27:1063-1067.

25. Schmidt SY, Peisch RD: Melanin concentration in normal human retinal pigment epithelium. Regional variation and age-related reduction. Investigative Ophthalmology & Visual Science 1986;27:1063-1067.