Peran Gen ATM ATR pada Resistensi Subpopulasi Cancer Stem Cell Kanker Ovarium Stadium Lanjut: Respons Terapi terhadap Apoptosis dan Proliferasi in vitro = The Role of the ATM ATR Gene on Resistance of Cancer Stem Cell Subpopulations in Advanced Ovarian Cancer: Therapy Response to Apoptosis and Proliferation in vitro