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Figure 3. Total number of tumour cells(proliferating, dormant and dead cells) as a function of time for the hyperfractionated (1.2 Gy twice daily, 5 days per week to the dose of 76.8 Gy, "HF-76.8") and accelerated hyperfractionated (1.6 Gy twice daily, 5 days per week to the dose of 48 Gy, "AHF-48") radiotherapy schedules. Irradiation starts on the first day of the first week. HF-76.8 is completed on day 44 after initiation of treatment whereas AHF-48 is completed on day 19. Both irradiation schedules start on the first day of the first week of treatment.