1. Division of Urology, John H. Stroger Jr. Hospital of Cook County, Chicago, IL, USA
2. Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, MN, USA
3. Department of Urology, Mayo Clinic, Rochester, MN, USA
4. Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA