Which of the following provocation dosage represents a posit…
Which of the following provocation dosage represents a positive response to a methacholine challenge test? (1) PD6FEV1 = 0.12 mg/ml (2) PD12FEV1 = 0.24 mg/ml (3) PD15FEV1 = 0.96 mg/ml (4) PD22FEV1 = 3.8 mg/ml