Predictors of survival among head and neck cancer patients after radiotherapy based on health-related quality of life indices and symptoms-specific outcomes: a systematic review. - Ghazali, Siti Nur Akmal; Manan, Hanani Abdul; Chan, Caryn Mei Hsien; Eezamuddeen, Marfu'ah Nik; Yahya, Noorazrul (Quality of Life Research, 2025)