Toxicological Sciences 69, 286-287 (2002)
Copyright © 2002 by the Society of Toxicology
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Environmental and Occupational Toxicology Division Safe Environments Programme Health Canada, P.L. 0803D Tunney's Pasture, Ottawa, Ontario K1A 0L2, Canada E-mail: mike_wade@hc-sc.gc.ca.
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To the Editor:
Dr. Calabrese has correctly pointed out that we did observe biphasic responses of several endpoints, specifically, total epididymal sperm, and natural killer cell activity in male rats exposed subchronically