The primary end point was the onset of severe mucositis and the incidence of the severe mucositis. Severe mucositis was defined as the Radiation Therapy Oncology Group mucositis grade 2, 3 and 4. The onset of severe mucositis was defined as the time from the first day of radiation to the day that the observer recorded the most severe mucositis. The secondary data collected for the study were the percentage of weight loss, the number of the patients and duration of radiation break due to mucositis, analgesic, antibiotics and antifungal drug requirement for mucositis treatment and adverse events.