S. Hallock du Pont Professor of Animal Sciences, University of Delaware

University of Wisconsin, Madison

University of Nottingham, UK

Indian Council of Agricultural Research, National Dairy Research Institute, Indian Veterinary

Professor für Tierernährung

Professor of Agronomy, University of Wisconsin

Nanjing Agricultural University

Gyeongsang National University / University of Florida / RDA, NIAS, Republic of Korea

Zhengzhou University

Namık Kemal University