AUTHOR=Eaton Douglas C. TITLE=Frontiers in Renal and Epithelial Physiology – Grand Challenges JOURNAL=Frontiers in Physiology VOLUME=3 YEAR=2012 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2012.00002 DOI=10.3389/fphys.2012.00002 ISSN=1664-042X