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Systematic review flow diagram. n, number of articles; CENTRAL, Cochrane Central Register of Controlled Trials; RCT, randomized controlled trial; QOL, quality of life; NSCLC, non-small cell lung cancer; EORTC, European Organization for Research and Treatment of Cancer Core Questionnaire; QLQ, quality of life questionnaire; FACT-L, Functional Assessment of Cancer Therapy-Lung; HQOL, health-related quality of life.
