1. Professor of Medicine, Creighton University School of Medicine; Chief, Medical Service, Veterans Administration Medical Center, Omaha, Nebraska.
2. Research Chemist, Veterans Administration Medical Center, Omaha, Nebraska.
3. Assistant Professor, Marshall University School of Medicine, Huntington, West Virginia and Veterans Administration Hospital, Huntington, West Virginia.
4. Professor of Medicine, Marshall University School of Medicine; Chief, Medical Service, Veterans Administration Hospital, Huntington, West Virginia.