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Extension Poultry Veterinarian and Assistant Professor at Iowa State University.

Assistant Professor of Animal Science at Purdue University.

Endowed Chair in Bio-economy Sustainability Management/Egg Industry Chair in Sustainability at the University of British Columbia – Okanagan, Canada.

Professor in the Department of Food, Agricultural and Biological Engineering at The Ohio State University.

Professor in the Department of Food Science and Human Nutrition at the University of Tennessee.

Professor in the Department of Animal Biosciences at the University of Guelph.