[1] Colorado State Univ, Dept Anim Sci, Ft Collins, CO 80523 USA
[2] Colorado State Univ, Coll Vet Med & Biomed Sci, Ft Collins, CO 80523 USA
[3] Vanderbilt Univ, Sch Med, Dept Med, Div Allergy Pulm & Crit Care, Nashville, TN 37212 USA
[4] Vanderbilt Univ, Sch Med, Dept Pediat, Div Med Genet & Genom Med, Nashville, TN 37212 USA