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Effect of diacetyl inhalation on reactivity of IPT to IL MCh. MCh EC50 values and maximum responses are summarized in Table 3. Control, n = 50; 100 ppm, n = 10; 200 ppm, n = 9; 300 ppm, n = 14; 360 ppm, n = 8. Asterisk indicates significantly different from air-exposed (p < .05).
