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An error in an earlier paper [Phys. Rev. 124, 983 (1961)] is corrected. This error occurred in the derivation of nonlinear transport equations from a generalized Fokker-Planck equation, and took the form of neglecting certain fluctuations. When these are accounted for, the resulting transport equations contain fluctuation-renormalized transport coefficients.
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Zwanzig et al. (1972) studied this question.
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