1316: EARLY- VERSUS LATE-ONSET OLIGURIC AKI FOR STAGE PROGRESSION AMONG ICU PATIENTS AFTER CARDIAC SURGERY. Issue 12 (December 2016) - Izawa, Junichi; Kitamura, Tetsuhisa; Uchino, Shigehiko; Takinami, Masanori; Kawamura, Takashi; Iwami, Taku