Fig. 1From: Diagnostic value of chest computed tomography imaging for COVID-19 based on reverse transcription-polymerase chain reaction: a meta-analysisFlowchart of literature selection process used for this meta-analysis. CBM (http://sinomed.ac.cn/), CNKI (https://www.cnki.net/), Wan-fang (https://www.wanfangdata.com.cn/index.html), and VIP (http://cstj.cqvip.com/)Back to article page