663: CLINICAL SIGNIFICANCE OF PERIPHERAL BLAST CLEARANCE IN CHILDREN WITH HYPERLEUKOCYTIC ACUTE LEUKEMIA. (16th December 2021) - abbas, Qalab; Jabbar, Rafia; Nasir, Saad; Saleem, Muhammad; Jabbar, Naeem; Rehman, Faiza; Rafiq, Naila; Haque, Anwar