Affiliation: | (1) Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA;(2) Present address: Northwestern University Feinberg School of Medicine, Evanston, Illinois, USA;(3) Department of Animal Sciences, University of Illinois at Urbana-Champaign, 1201 W. Gregory Dr., Edward R. Madigan Laboratory 382, Urbana, IL 61801, USA |