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Survival rates of patients with ALDH1A1+ or ALDH1A1− tumors with known day of mortality. Patients with ALDH1A1+ tumors appeared to exhibit reduced survival. (HPV was an independent prognostic factor for better survival). ALDH1A1, aldehyde dehydrogenase 1 family, member A1; CD44, hyaluronan receptor cluster of differentiation 44; HPV, human papilloma virus.
