In regions that are endemic for NPC, the prevalence of EBV and HPV coinfection in patients with NPC is extremely low. Conversely, patients with EBV-/HPV+ NPC demonstrate significantly better local tumor control and survival after radiotherapy. Cancer 2018;124:530-6. © 2017 American Cancer Society.

Surgery is effective in the treatment of secondary complications of skull base ORN after previous radiotherapy for NPC.

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With the increasingly tense global situation, international interests chains are more complicated. Energy is playing an important role. The scientific formulation and implementation of Energy strategy are not only benefit to a country's domestic development, but also greatly affect a country's international status in the world stage. Therefore the study of international energy strategy is necessary. This article first analyzes the current energy situation of China, then makes a comparison of different countries’energy security strategies, raises some useful recommendations to Chinese energy security strategy in the end.