“…Within studies on pediatric patients, parameters including body weight prior to chemotherapy [4], blood type [5], underlying malignant disease [6], specific chemotherapy regimens or protocols [7], [8], serum creatinine level [4], blood methotrexate concentration [9], and neutropenia [4], [10], [11] have been suggested as risk factors for developing oral mucositis. However, the relative contribution of these risk factors in relation to mucositis is not clear, which makes it difficult to identify the patients at a higher risk of oral mucositis.…”