Assertion: formaldehyde's effect | /r/HasProperty | restricted to upper respiratory tract
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text: Most, if not all reviewers, have agreed that cancer of the respiratory tract, particularly the upper respiratory tract, is more biologically plausible than formaldehyde-induced cancer at distant sites given the reactivity of formaldehyde, the capacity of tissues to metabolize formaldehyde, & the results from chronic rodent inhalation studies showing that formaldehyde-induced nonneoplastic & neoplastic effects are restricted to the upper respiratory tract with exposures to concn below 5-10 ppm.