1. Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, United States
2. Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
3. Department of Chemistry and Biochemistry, California State University Northridge, Northridge, California 91330, United States
4. Department of Urology, Mayo Clinic, Rochester, Minnesota 55905, United States
5. Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota 55905, United States