Abstract
| - In the recent article by Cannon et al. (Cannon RO, Poliner JR, Hirschhorn RH, et al. A multistate outbreak of Norwalk virus gastroenteritis associated with consumption of commercial ice. J Infect Dis 1991; 164:860-3), the participation of the Clinical Microbiology Laboratory of the Hospital of the University of Pennsylvania, Philadelphia, should have been acknowledged. The authors regret the oversight.
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