^*Division of Nephrology, Department of Medicine, School of Medicine, University of Louisville, Louisville, Kentucky.

^†Veterans Affairs Medical Center, Louisville, Kentucky.

Correspondence to Dr. Richard A. Ward, Kidney Disease Program, University of Louisville, 615 South Preston Street, Louisville, KY 40202-1718. Phone: 502-852-5757; Fax: 502-852-7643; E-mail: [email protected]

Received December 15, 1998. Accepted December 16, 1998.