References

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3. Committee for the Classification of Retinopathy of Prematurity. An international classification of retinopathy of prematurity. British journal of ophthalmology, 1984, 68: 690-697.

4. Brown DR, Biglan AW, Stretavsky M. Screening criteria for the detection of retinopathy of prematurity in patients in a neonatal intensive care unit. Journal of pediatric ophthalmology and strabismus, 1987, ~4: ~I2-2I4.

5. Cryotherapy for Retinopathy of Prematurity Cooperative Group. Multicenter trial of cryotherapy for retinopathy of prematurity: preliminary results. Archives of ophthalmology, 1988, 106: 47I - 479.

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7. Mamdani M, Ross D. Vitamin A supplementation and child survival; magic bullet or false hope? London, London School of Tropical Medicine and Hygiene, 1988 (EPC Publication No. I9).

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9. Hussey GD, Klein M. A randomized controlled trial of vitamin A in children with severe measles. New England journal of medicine, 1990, 323: I60-I64.

10. Dawson CR, Jones BR, Tarizzo ML. Guide to trachoma control. Geneva, World Health Organization, I98I.

11. The provision of spectacles at low cost. Geneva, World Health Organization, 1987.