1. Depts. of Medicine of the University of Missouri Health Sciences Center Harry S. Truman Memorial V A Hospital, Dalton Re. search Center and Dialysis Clinics, Inc., Co. lumbia, Missouri
2. Booth Memorial Hospital, Flushing, New York
3. Indiana University Medical Center, Indianapolis, Indiana; Ochsner Medical Institution, New Orleans, Louisiana
4. Artificial Organs Division, Baxter. Travenol Laboratories, Deerfield, Illinois.