Onco-Nephrology Fellowship The Renal Service at Memorial Sloan Kettering Cancer Center takes great pride in offering several distinct training experiences for the next generation of nephrologists. These training opportunities include a one-year Onco Nephrology Fellowship, a three-month experience for the first-year renal fellows from the Weill Cornell Medicine program, and an opportunity for renal fellows from other institutions to rotate on the Onco Nephrology inpatient and outpatient services.