1. Variability in grading diabetic retinopathy from stereo fundus photographs: Comparison of physian and lay readers;Milton;Br J Ophthalmol,1977
2. The normal retinal fluorescein angiogram I. A study of the fluorescein angiographic appearance of the retina in normal subjects without ophthalmoscopically obvious pathological changes;Nielsen;Acta Ophthalmol (Copenh),1982
3. The normal fundus fluorescein angiogram II. A longitudianl fluorescein angiographic study of the fundus in normal subjects without ophthalmoscopically abnormalities;Nielsen;Acta Ophthalmol (Copenh),1985a
4. The normal fundus fluorescein angiogram IV. A classification of the normal fluorescein angiogram based on angiographic findings in clinically healthy subjects and in diabetics without ophthalmoscopically abnormalities;Nielsen;Acta Ophthalmol (Copenh),1985b
5. The normal fundus fluorescein angiogram III. A longitudinal fluorescein angiographic study of the fundus in insulin dependent diabetics without ophthalmoscopically abnormalities;Nielsen;Acta Ophthalmol (Copenh),1985c