1. Department of Health Science, Public University of Navarre, 31008 Pamplona, Spain
2. Departments of Urology and Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
3. Department of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
4. Instituto de Investigación Sanitaria de Navarra (IdiSNA), Navarre Institute for Health Research, 31008 Pamplona, Spain