Fig. 1From: Intracranial aneurysms formation after radiotherapy for head and neck cancer: a 10-year nationwide follow-up studyFlow diagram of this nationwide-based study. Abbreviations: NPC-RT, nasopharyngeal cancer patients with radiotherapy; Non-NPC–RT, other head and neck cancer patients with radiotherapy; Non-NPC-NRT, other head and neck cancer patients without radiotherapyBack to article page