Peran sel punca kanker, faktor apoptosis, DNA repair, dan telomerase terhadap respons terapi radiasi pada kanker serviks stadium III B: kajian khusus pada ekspresi SOX2 dan OCT4 = Role of cancer stem cell apoptotic factor DNA repair and telomerase toward radiation therapy response in stage iiib cervical cancer special study on SOX2 and OCT4 expression