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Sutter, R W., E W. Brink, S L. Cochi, O M. Kew, W A. Orenstein, R J. Biellik, and A R. Hinman. A New Epidemiologic and Laboratory Classification System for Paralytic Poliomyelitis Cases. 1989.

Sutter, R W., et al. A New Epidemiologic and Laboratory Classification System for Paralytic Poliomyelitis Cases. 1989.