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Fig. 1 | BMC Cancer

Fig. 1

From: Thoracic injection of low-dose interleukin-2 as an adjuvant therapy improves the control of the malignant pleural effusions: a systematic review and meta-analysis base on Chinese patients

Fig. 1

Screening and identification of included studies. a A total of 18 articles that met the inclusion criteria were included in meta-analysis, which were searched from the database of Medline/PubMed, EMBASE, Cochrance Library, Web of Science, Chinese Journal Full-text Database and Chinese Sci-Tech Journals Database. b, c Through a comprehensive analysis according to the Cochrane Handbook of Systematic Review, we found that except for a study that was low risk, the other studies did not have obvious biases

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