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Research Article
Plasma vitamin A and beta-carotene in retinitis pigmentosa.
  1. W. H. Massoud,
  2. A. C. Bird and
  3. E. S. Perkins

    Abstract

    Plasma levels of vitamin A and beta-carotene were measured by spectrophotometry in 39 patients with genetically determined retinitis pigmentosa, No difference was found between the levels in these patients and the levels in a control group.

    https://doi.org/10.1136/bjo.59.4.200

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