COMPARISON OF PERIPHERAL BLOOD ACTIVATED NK CELL PERCENTAGE BEFORE AND AFTER INDUCTION PHASE CHEMOTHERAPY IN PEDIATRIC ACUTE LYMPHOBLASTIC LEUKEMIA (Perbandingan Persentase Sel NK Teraktivasi Darah Tepi Sebelum dan Sesudah Kemoterapi Tahap Induksi di Pasien Leukemia Limfoblastik Akut Anak) - TJ, Syntia (PERHIMPUNAN DOKTER SPESIALIS PATOLOGI KLINIK INDONESIA, 2018)