Comparison of Percentage Peripheral Blood Lymphoblast Proliferation and Apoptosis in Pediatric Acute Lymphoblastic Leukemia Before and After Chemotherapy Induction Phase (Perbandingan Persentase Proliferasi dan Apoptosis Limfoblas di Darah Tepi di Pasien Leukemia Limfoblastik Akut Anak Sebelum dan Sesudah Kemoterapi Tahap Induksi) - Farida Nur'Aini (Indonesian Association of Clinical Pathologist and Medical Laboratory, 2017)