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Science 29 April 1994:
Vol. 264. no. 5159, p. 644
DOI: 10.1126/science.264.5159.644-a
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Corrections and Clarifications

In the report, "High performance photorefractive polymers" by M. Liphardt et al. (21 Jan., p. 367), equation 2 on page 368 was incorrect. It should have read

[See equation in the PDF file]

Consequently, the value of the effective electrooptic response derived from equation 2, as reported in the second paragraph on page 369, should have been n03reff = 3 ± 0.5 pm/V.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)