1. Department of Urology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, USA.
2. David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, USA.
3. Independent Researcher, Los Angeles, California, USA.
4. Section of Colorectal Surgery, Department of Surgery, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, USA.
5. Surgical and Perioperative Careline, VA Greater Los Angeles Healthcare System, Los Angeles, California, USA.
6. Department of Health Policy and Management, Fielding School of Public Health, University of California Los Angeles, Los Angeles, California, USA.
7. School of Nursing, University of California Los Angeles, Los Angeles, California, USA.