1. Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, California
2. University of Southern California Neurorestoration Center, Los Angeles, California
3. Department of Urology, Keck School of Medicine, University of Southern California, Los Angeles, California
4. Rancho Research Institute, Rancho Los Amigos National Rehabilitation Center, Downey, California
5. School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran