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Overall survival (OS) and progression-free survival (PFS) for metastatic nasopharyngeal carcinoma (NPC) patients by body mass index (BMI) levels. Overweight/obese patients had significantly higher OS (a) and PFS (b) rates than underweight patients, whereas no significant differences were observed in OS and PFS between normal weight and underweight patients. UW underweight, NW normal weight, OW overweight/obese
