1. Variability in grading diabetic retinopathy from stereo fundus photographs: Comparison of physician 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 longitudinal fluorescein angiographic study of the fundus in normal subjects without ophthalmoscopically abnormalities;Nielsen;Acta Ophthalmol (Copenh),1985a
4. 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),1985b
5. The normal fundus fluorescein angiogram. V. Intraobserver, interobserver variation and interocular variation of the fundus fluorescein angiogram;Nielsen;Acta Ophthalmol (Copenh),1985c