Fig. 1From: Concurrent chemoradiotherapy with or without cetuximab for stage II to IVb nasopharyngeal carcinoma: a case–control studyStudy flow diagram. NPC, nasopharyngeal carcinoma; SYSUCC, Sun Yat-Sen University Cancer Center; CCRT, concurrent chemoradiotherapy; EBV DNA: Epstein-Barr virus deoxyribonucleic acid; ECOG PS: Eastern Cooperative Oncology Group performance statusBack to article page