Pretreatment Serum Lactate Dehydrogenase Level as an Independent Prognostic Factor of Nasopharyngeal Carcinoma in the Intensity- Modulated Radiation Therapy Era. - Zhuhong Chen; Qiaojuan Guo; Tianzhu Lu; Shaojun Lin; Jingfeng Zong; Shenghua Zhan; Luying Xu; Jianji Pan (Medical science monitor: international medical journal of experimental and clinical research, 2018)