The orl rat is more responsive to methacholine challenge than wild type.

Rodriguez E, Barthold JS, Kreiger PA, Armani MH, Wang J, Michelini KA, Wolfson MR, Boyce R, Barone CA, Zhu Y, Waldman SA, Shaffer TH. The orl rat is more responsive to methacholine challenge than wild type. Pulm Pharmacol Ther. 2014 Dec; 29(2):199-208.

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