Professor, Department of Pathology, Carver College of Medicine, University of Iowa

Emeritus Professor of Veterinary Pathology, University of Pennsylvania

Professor of Comparative Pathology, Shiraz University

Veterinary Research Institute, Pesahwar, The University of Agriculture Peshawar

Professor of Veterinary Pathology, Universidade Federal de Minas Gerais

University of Las Palmas de Gran Canaria

NIH

professor of veterinary pathology

Profesor

Emeritus professor of pathology, University of Wisconsin