In regard to Zhou et al ``Baseline Serum Lactate Dehydrogenase Levels for Patients Treated With Intensity-Modulated Radiotherapy for Nasopharyngeal Carcinoma: A Predictor of Poor Prognosis and Subsequent Liver Metastasis{''} (Int J Radiat Oncol Biol Phys 2012;82:e359-e365)