respiratory — airway resistance         ventilator   Berndt1 resistance [cm/mL/s]         • untreated  36 strains   age 9-12wks   Inbred Berndt1 resistance [cm/mL/s]     baseline and  methacholine       • baseline    MCh challenge (mg/mL): • 1   • 3   • 10   • 30    • comparison   36 strains   age 9-12wks   Inbred Berndt1 resistance (percent of baseline) [%]   methacholine       MCh challenge (mg/mL): • 1   • 3   • 10   • 30    • comparison   36 strains   age 9-12wks   Inbred

Number of mice tested per strain, for each measurement