1. Department of Urology, Universidad Autónoma de Nuevo León, Monterrey, Mexico
2. Hospital Universitario Dr. José Eleuterio González and Faculty of Medicine, Universidad Autónoma de Nuevo León, Monterrey, Mexico
3. High Specialty Microbiological Diagnostic Laboratory, Department of Gastroenterology, Universidad Autónoma de Nuevo León, Monterrey, Mexico
4. Urology Residency Program, Universidad Autónoma de Nuevo León, Monterrey, Mexico