@conference {layton2003impaired, title = {Impaired countercurrent exchange in a mathematical model of a urine concentrating mechanism lacking UT-B urea transporter.}, booktitle = {JOURNAL OF THE AMERICAN SOCIETY OF NEPHROLOGY}, volume = {14}, year = {2003}, pages = {76A{\textendash}76A}, publisher = {LIPPINCOTT WILLIAMS \& WILKINS 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA}, organization = {LIPPINCOTT WILLIAMS \& WILKINS 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA}, author = {Layton, HE and Layton, AT} }