A study of quality assessment in SARS-CoV-2 pathogen nucleic acid amplification tests performance; from the results of external quality assessment survey of clinical laboratories in the Tokyo Metropolitan Government external quality assessment program in 2020

新冠病毒病原体核酸扩增检测质量评估研究——基于2020年东京都厅外质量评估项目临床实验室室间质量评估调查结果