1. Department of Urology, University of California-Irvine, Orange, California.
2. Department of Family Medicine, University of California-Irvine, Orange, California.
3. University of Iowa, Iowa City, Iowa.
4. Cleveland Clinic, Cleveland, Ohio.
5. University of Wisconsin, Madison Medical School, Madison, Wisconson.
6. University of Rochester, Rochester, New York.
7. Boston University, Boston, Massachusetts.
8. University of Chicago, Chicago, Illinois.
9. Weill School of Medicine, Cornell University, New York, New York.