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“Percutaneous Endourology” by Michael Grasso, M.D.

An eMedicine article (WebMD) written by Dr. Michael Grasso (Chairman, Department of Urology, Saint Vincent’s Medical Center, Manhattan; Professor and Vice Chairman, Department of Urology, New York Medical College), Dr. Keith T Tracy ( Staff Physician, Department of Urology, New York Medical College, Westchester Medical Center), and Dr. Mitchell Fraiman (Staff Physician, Department of Urology, New York University Medical Center).